What’s the cheapest layover airport for flights from Buffalo to Seattle?

Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of C$ 585.

Which airport typically offers the quickest layover for flights from Buffalo to Seattle?

Flights via Chicago (MDW) offer the fastest connection on this route, with an average layover time of 1h 08m.

What’s the top layover airport for flights from Buffalo to Seattle?

Chicago (ORD) – chosen by Cheapflights users on 44% of one-stop itineraries from Buffalo to Seattle on Cheapflights.

What’s the fastest layover option from Buffalo to Seattle?

Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 7h 20m.

How long is the flight from Buffalo to Seattle?

There are many flights that can get you from Buffalo to Seattle in 7h 13m. Fly via Southwest, United Airlines, or Delta to get the fastest option. Buffalo and Seattle are separated by a distance of 3404 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines flying from Buffalo to Seattle round-trip?

According to our current data, Southwest (C$ 425), and United Airlines (C$ 472) offers the cheapest pricing from Buffalo to Seattle. Southwest is priced at 34% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Buffalo to Seattle one-way?

To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at C$ 161. Delta flights start at C$ 162 while deals on United Airlines start at C$ 176 one-way.

What is the cheapest day to fly from Buffalo to Seattle?

Travelers seeking maximum savings on their Buffalo to Seattle flight should consider departing on Friday afternoons when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

What is the cheapest day to fly round-trip from Buffalo to Seattle?

Leaving on a Thursday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 52% on the overall cost on flights from Buffalo to Seattle.

How far in advance should I book a flight from Buffalo to Seattle?

To save on the cost of your flight from Buffalo to Seattle, book at least 49 days before your planned departure. Booking around this time can save you about 44% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 389 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 1,071.

What is the cheapest month to fly from Buffalo to Seattle?

September can be a great time to fly to Seattle from Buffalo with a flight ticket averaging about C$ 649. Cheapflights users have found deals in the month of September for as cheap as C$ 359. The most expensive prices can be found in the month of December.

Can I find deals for flights from Buffalo to Seattle that include hotel bookings?

Yes. In addition to deals on Buffalo to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Buffalo to Seattle?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to Seattle.

Can I find deals for business class flights from Buffalo to Seattle?

Yes. Cheapflights offers flight deals from Buffalo to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 161+ Cheap Flights from Buffalo to Seattle

Cheapflights Tip: The best prices from Buffalo to Seattle/Tacoma Intl are usually found in September or March, booked 48 days in advance, depart on a Friday or Monday and return on a Tuesday

Cheap flight deals from Buffalo to Seattle

Round-trip from	C$ 290
One-way from	C$ 161
Popular in	December
Cheapest in	September
Average price	C$ 578

Southwest
13/1-20/1
2 total stops
16h 25m total
Buffalo to Seattle

Search Deals

American Airlines
25/10
1 total stop
10h 32m total
Buffalo to Seattle

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (C$ 46 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Buffalo to Seattle

Cheapest flights from Buffalo to Seattle
Explore the most affordable flight options available from Buffalo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Wed 12/112:05 p.m.BUF - SEA

1 stop11h 25mSouthwest

Mon 17/117:05 a.m.SEA - BUF

1 stop12h 35mSouthwest

Deal found 9/9C$ 320

Wed 8/106:14 a.m.BUF - SEA

1 stop17h 32mAmerican Airlines

Wed 15/105:22 a.m.SEA - BUF

1 stop8h 30mAmerican Airlines

Deal found 10/9C$ 323

Fri 19/94:57 p.m.BUF - SEA

1 stop10h 33mFrontier

Sat 27/97:00 a.m.SEA - BUF

1 stop30h 02mFrontier

Deal found 10/9C$ 340

Sat 1/115:14 p.m.BUF - SEA

1 stop9h 40mDelta

Mon 3/1111:10 p.m.SEA - BUF

1 stop8h 51mDelta

Deal found 11/9C$ 345

Wed 12/1110:37 a.m.BUF - SEA

2 stops11h 15mUnited Airlines

Mon 17/1111:59 p.m.SEA - BUF

1 stop7h 04mUnited Airlines

Deal found 9/9C$ 359

Fri 5/129:14 a.m.BUF - SEA

1 stop8h 31mDelta

Sat 6/1211:50 a.m.SEA - BUF

1 stop8h 07mDelta

Deal found 11/9C$ 366

Fri 24/1012:49 p.m.BUF - SEA

1 stop8h 34mDelta

Mon 27/109:55 p.m.SEA - BUF

1 stop10h 06mDelta

Deal found 11/9C$ 377

Fri 3/107:07 a.m.BUF - SEA

2 stops11h 25mUnited Airlines

Tue 7/1012:43 p.m.SEA - BUF

1 stop7h 03mUnited Airlines

Deal found 10/9C$ 410

Wed 1/1010:50 a.m.BUF - SEA

2 stops10h 03mUnited Airlines

Sun 5/1011:10 a.m.SEA - BUF

1 stop8h 36mUnited Airlines

Deal found 11/9C$ 424

Fri 5/121:16 p.m.BUF - SEA

1 stop8h 16mDelta

Sun 7/1211:10 p.m.SEA - BUF

1 stop6h 24mDelta

Deal found 11/9C$ 430

Wed 1/104:43 p.m.BUF - SEA

1 stop10h 11mDelta

Sun 5/1011:11 p.m.SEA - BUF

1 stop6h 12mDelta

Deal found 11/9C$ 431

Best flights from Buffalo to Seattle
Discover carefully curated flight deals from Buffalo to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 11 September 2025.

Tue 13/16:20 a.m.BUF - SEA

1 stop9h 55mSouthwest

Tue 20/16:45 a.m.SEA - BUF

1 stop6h 30mSouthwest

Deal found 11/9C$ 290

Tue 13/12:49 p.m.BUF - SEA

2 stops10h 54mUnited Airlines

Tue 20/18:00 a.m.SEA - BUF

1 stop8h 25mUnited Airlines

Deal found 11/9C$ 344

Sat 1/116:20 a.m.BUF - SEA

1 stop7h 13mDelta

Mon 3/1111:15 p.m.SEA - BUF

1 stop6h 08mDelta

Deal found 10/9C$ 345

Wed 12/112:05 p.m.BUF - SEA

1 stop11h 25mSouthwest

Mon 17/117:05 a.m.SEA - BUF

1 stop12h 35mSouthwest

Deal found 9/9C$ 320

Wed 12/1110:37 a.m.BUF - SEA

2 stops11h 15mUnited Airlines

Mon 17/1111:59 p.m.SEA - BUF

1 stop7h 04mUnited Airlines

Deal found 9/9C$ 359

Fri 5/129:14 a.m.BUF - SEA

1 stop8h 31mDelta

Sat 6/1211:50 a.m.SEA - BUF

1 stop8h 07mDelta

Deal found 11/9C$ 366

Fri 24/1012:49 p.m.BUF - SEA

1 stop8h 34mDelta

Mon 27/109:55 p.m.SEA - BUF

1 stop10h 06mDelta

Deal found 10/9C$ 377

Fri 3/107:07 a.m.BUF - SEA

2 stops11h 25mUnited Airlines

Tue 7/1012:43 p.m.SEA - BUF

1 stop7h 03mUnited Airlines

Deal found 10/9C$ 410

Sat 25/101:57 p.m.BUF - SEA

2 stops12h 23mUnited Airlines

Sat 1/118:36 a.m.SEA - BUF

2 stops9h 24mUnited Airlines

Deal found 10/9C$ 475

Last-minute flights from Buffalo to Seattle
Discover last-minute flight deals from Buffalo to Seattle. Data last updated 11 September 2025 and is based on user searches.

Fri 19/94:57 p.m.BUF - SEA

1 stop10h 33mFrontier

Sat 27/97:00 a.m.SEA - BUF

1 stop30h 02mFrontier

Deal found 10/9C$ 340

Wed 1/1010:50 a.m.BUF - SEA

2 stops10h 03mUnited Airlines

Sun 5/1011:10 a.m.SEA - BUF

1 stop8h 36mUnited Airlines

Deal found 11/9C$ 424

Wed 1/104:43 p.m.BUF - SEA

1 stop10h 11mDelta

Sun 5/1011:11 p.m.SEA - BUF

1 stop6h 12mDelta

Deal found 11/9C$ 431

Fri 3/107:07 a.m.BUF - SEA

2 stops11h 25mUnited Airlines

Tue 7/1012:43 p.m.SEA - BUF

1 stop7h 03mUnited Airlines

Deal found 10/9C$ 410

Wed 8/106:14 a.m.BUF - SEA

1 stop17h 32mAmerican Airlines

Wed 15/105:22 a.m.SEA - BUF

1 stop8h 30mAmerican Airlines

Deal found 10/9C$ 323

Wed 15/105:55 p.m.BUF - SEA

1 stop7h 35mUnited Airlines

Wed 22/107:37 p.m.SEA - BUF

2 stops11h 16mUnited Airlines

Deal found 11/9C$ 482

Fri 24/1012:49 p.m.BUF - SEA

1 stop8h 34mDelta

Mon 27/109:55 p.m.SEA - BUF

1 stop10h 06mDelta

Deal found 11/9C$ 377

Fri 24/107:07 a.m.BUF - SEA

1 stop7h 24mUnited Airlines

Mon 27/1011:59 p.m.SEA - BUF

2 stops11h 21mUnited Airlines

Deal found 10/9C$ 522

Sat 25/101:57 p.m.BUF - SEA

2 stops12h 23mUnited Airlines

Sat 1/118:36 a.m.SEA - BUF

2 stops9h 24mUnited Airlines

Deal found 10/9C$ 475

One-way flights from Buffalo to Seattle
Search for one-way flight options from Buffalo to Seattle. Find affordable one-way fares based on user searches. Data last updated 11 September 2025.

Sat 25/106:14 a.m.BUF - SEA

1 stop10h 32mAmerican Airlines

Deal found 10/9C$ 161

Sat 4/106:15 a.m.BUF - SEA

1 stop7h 21mDelta

Deal found 11/9C$ 162

Wed 1/102:50 p.m.BUF - SEA

1 stop8h 54mUnited Airlines

Deal found 11/9C$ 169

Thu 2/104:43 p.m.BUF - SEA

1 stop10h 11mDelta

Deal found 11/9C$ 184

Fri 3/104:43 p.m.BUF - SEA

1 stop10h 11mDelta

Deal found 11/9C$ 194

Tue 30/91:57 p.m.BUF - SEA

1 stop7h 52mUnited Airlines

Deal found 11/9C$ 238

Wed 7/19:55 a.m.BUF - SEA

2 stops11h 31mUnited Airlines

Deal found 11/9C$ 241

Sat 27/93:55 p.m.BUF - SEA

1 stop9h 25mJetBlue

Deal found 10/9C$ 245

Wed 24/96:03 a.m.BUF - SEA

2 stops15h 48mDelta

Deal found 10/9C$ 281

Tue 23/93:51 p.m.BUF - SEA

1 stop21h 24mDelta

Deal found 10/9C$ 328

Fly from

Fly to

Route

Depart

Return

Price

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Tue 13/1

6:20 a.m.-1:15 p.m.

1 stop9h 55m

Seattle/Tacoma Intl

Tue 20/1

6:45 a.m.-4:15 p.m.

1 stop6h 30m

C$ 290

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Wed 12/11

2:05 p.m.-10:30 p.m.

1 stop11h 25m

Seattle/Tacoma Intl

Mon 17/11

7:05 a.m.-10:40 p.m.

1 stop12h 35m

C$ 320

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Tue 13/1

2:49 p.m.-10:43 p.m.

2 stops10h 54m

Seattle/Tacoma Intl

Tue 20/1

8:00 a.m.-7:25 p.m.

1 stop8h 25m

C$ 344

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Sat 1/11

6:20 a.m.-10:33 a.m.

1 stop7h 13m

Seattle/Tacoma Intl

Mon 3/11

11:15 p.m.-8:23 a.m.

1 stop6h 08m

C$ 345

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Wed 12/11

10:37 a.m.-6:52 p.m.

2 stops11h 15m

Seattle/Tacoma Intl

Mon 17/11

11:59 p.m.-10:03 a.m.

1 stop7h 04m

C$ 359

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Fri 5/12

9:14 a.m.-2:45 p.m.

1 stop8h 31m

Seattle/Tacoma Intl

Sat 6/12

11:50 a.m.-10:57 p.m.

1 stop8h 07m

C$ 366

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Fri 24/10

12:49 p.m.-6:23 p.m.

1 stop8h 34m

Seattle/Tacoma Intl

Mon 27/10

9:55 p.m.-11:01 a.m.

1 stop10h 06m

C$ 377

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Fri 3/10

7:07 a.m.-3:32 p.m.

2 stops11h 25m

Seattle/Tacoma Intl

Tue 7/10

12:43 p.m.-10:46 p.m.

1 stop7h 03m

C$ 410

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Sat 25/10

1:57 p.m.-11:20 p.m.

2 stops12h 23m

Seattle/Tacoma Intl

Sat 1/11

8:36 a.m.-9:00 p.m.

2 stops9h 24m

C$ 475

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Sat 25/10

6:14 a.m.-1:46 p.m.

1 stop10h 32m

C$ 161

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 21 results

Best time to book a flight from Buffalo to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Buffalo with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Buffalo to Seattle

Prices

How far ahead should I book a flight from Buffalo to Seattle?

To ensure you get the cheapest price possible for a flight from Buffalo to Seattle, you should look to book at least 48 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Buffalo to Seattle?

Currently, January is the cheapest month in which you can book a flight from Buffalo to Seattle (average of C$ 262). Flying from Buffalo to Seattle in December is currently the most expensive (average of C$ 353). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BUF to SEA?

Unlike in the morning, when flights are generally more expensive, you can save up to 41% on flights from Buffalo to Seattle by exploring options for tickets in the evening.

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Southwest and United Airlines from Buffalo to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,248 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Southwest

8.0

Very good

4,248 reviews

Southwest

8.0

Very good

4,248 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

United Airlines

7.4

Good

8,937 reviews

Southwest

8.0

Very good

4,248 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

How long is the flight from Buffalo to Seattle?
There are many flights that can get you from Buffalo to Seattle in 7h 13m. Fly via Southwest, United Airlines, or Delta to get the fastest option. Buffalo and Seattle are separated by a distance of 3404 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Buffalo to Seattle round-trip?
According to our current data, Southwest (C$ 425), and United Airlines (C$ 472) offers the cheapest pricing from Buffalo to Seattle. Southwest is priced at 34% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Buffalo to Seattle one-way?
To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at C$ 161. Delta flights start at C$ 162 while deals on United Airlines start at C$ 176 one-way.
Can I find deals for flights from Buffalo to Seattle that include hotel bookings?
Yes. In addition to deals on Buffalo to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Buffalo to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to Seattle.
Can I find deals for business class flights from Buffalo to Seattle?
Yes. Cheapflights offers flight deals from Buffalo to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Buffalo to Seattle?
Currently, January is the cheapest month in which you can book a flight from Buffalo to Seattle (average of C$ 262). Flying from Buffalo to Seattle in December is currently the most expensive (average of C$ 353). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Tacoma

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Other flights to Seattle

Top 2 airlines flying from Buffalo to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Southwest	CheapestC$ 425	AverageC$ 625	FlexibilityNo cancel fee	On-time63%	Search Southwest flights
United Airlines	CheapestC$ 472	AverageC$ 898	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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How does Cheapflights help users find flights from Buffalo to Seattle?

Cheapflights makes it easy to find Buffalo to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Buffalo to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Buffalo to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Buffalo to Seattle with no change fees?

Yes, we can. To see specific flights from Buffalo to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Buffalo to Seattle become cheaper?

Not ready to book yet? You can track prices for flights from Buffalo to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Buffalo to Seattle from C$ 161

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Buffalo to Seattle/Tacoma Intl are usually found in September or March, booked 48 days in advance, depart on a Friday or Monday and return on a Tuesday

Cheap flight deals from Buffalo to Seattle

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Buffalo to Seattle

Cheapest flights from Buffalo to SeattleExplore the most affordable flight options available from Buffalo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Explore the most affordable flight options available from Buffalo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Buffalo to Seattle that are best for you.

Best time to book a flight from Buffalo to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Buffalo with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Buffalo to Seattle

How far ahead should I book a flight from Buffalo to Seattle?

What is the cheapest month to book a flight from Buffalo to Seattle?

What is the cheapest time of day to fly from BUF to SEA?

What’s the top layover airport for flights from Buffalo to Seattle?

What’s the fastest layover option from Buffalo to Seattle?

What’s the fastest layover option from Buffalo to Seattle?

Which airport typically offers the quickest layover for flights from Buffalo to Seattle?

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Southwest and United Airlines from Buffalo to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Buffalo to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Buffalo to Seattle?

What are the cheapest airlines flying from Buffalo to Seattle round-trip?

What are the cheapest airlines to fly from Buffalo to Seattle one-way?

Can I find deals for flights from Buffalo to Seattle that include hotel bookings?

How can I find direct flights from Buffalo to Seattle?

Can I find deals for business class flights from Buffalo to Seattle?

What is the cheapest month to book a flight from Buffalo to Seattle?

Travelling to a place near Seattle?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Buffalo to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Buffalo to Seattle

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Buffalo to Seattle?

Why should you use Cheapflights to find cheap flight tickets from Buffalo to Seattle?

Can Cheapflights find flights from Buffalo to Seattle with no change fees?

Can Cheapflights notify me if prices for flights from Buffalo to Seattle become cheaper?

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Cheapest flights from Buffalo to Seattle
Explore the most affordable flight options available from Buffalo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.