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Cheap flights from Seattle to Philadelphia from C$ 291
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
11 Nov — 18 Nov1
Cheap flight deals from Seattle to Philadelphia
Enter your travel dates to find the best prices.
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Best
Direct
Last-minute
One-way
Cheapest flights from Seattle to PhiladelphiaExplore the most affordable flight options available from Seattle to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.
Explore the most affordable flight options available from Seattle to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.
Mon 26/1012:10 a.m. -
1 stop7h 30m
Sat 31/108:15 a.m. -
2 stops13h 00m
Deal found 8/10C$ 516
Wed 18/116:10 a.m. -
1 stop7h 05m
Wed 18/116:20 p.m. -
1 stop8h 15m
Deal found 8/10C$ 526
Sat 7/116:45 a.m. -
2 stops10h 35m
Fri 13/111:50 p.m. -
2 stops12h 15m
Deal found 8/10C$ 530
Thu 5/111:55 p.m. -
1 stop7h 15m
Thu 12/111:50 p.m. -
1 stop13h 55m
Deal found 8/10C$ 535
Thu 12/115:30 a.m. -
1 stop8h 10m
Mon 16/116:20 p.m. -
1 stop8h 15m
Deal found 9/10C$ 537
Fri 4/121:35 p.m. -
1 stop6h 50m
Mon 7/127:30 a.m. -
1 stop8h 20m
Deal found 7/10C$ 543
Thu 12/1110:56 p.m. -
1 stop7h 56m
Wed 18/1110:30 a.m. -
2 stops10h 27m
Deal found 11/10C$ 544
Tue 27/106:15 a.m. -
2 stops8h 40m
Sat 14/116:15 a.m. -
2 stops12h 50m
Deal found 8/10C$ 547
Fri 30/107:00 a.m. -
1 stop7h 47m
Sat 7/116:15 a.m. -
2 stops10h 40m
Deal found 9/10C$ 552
Mon 26/109:15 p.m. -
2 stops10h 25m
Fri 30/107:10 p.m. -
1 stop8h 30m
Deal found 7/10C$ 553
Best flights from Seattle to PhiladelphiaDiscover carefully curated flight deals from Seattle to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.
Discover carefully curated flight deals from Seattle to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.
Sat 23/110:00 a.m. -
1 stop9h 10m
Sat 30/15:10 a.m. -
1 stop9h 15m
Deal found 10/10C$ 537
Thu 12/1110:56 p.m. -
1 stop7h 56m
Wed 18/1110:30 a.m. -
2 stops10h 27m
Deal found 11/10C$ 544
Wed 11/119:38 p.m. -
Nonstop5h 05m
Sat 14/115:24 p.m. -
1 stop7h 34m
Deal found 11/10C$ 580
Thu 12/115:30 a.m. -
1 stop8h 10m
Mon 16/116:20 p.m. -
1 stop8h 15m
Deal found 9/10C$ 537
Sat 5/1210:55 a.m. -
1 stop8h 55m
Mon 4/16:25 p.m. -
1 stop9h 05m
Deal found 10/10C$ 537
Fri 4/127:54 p.m. -
1 stop7h 01m
Mon 7/127:11 p.m. -
1 stop7h 42m
Deal found 11/10C$ 594
Sat 19/1211:59 p.m. -
1 stop7h 53m
Wed 23/126:00 a.m. -
1 stop7h 44m
Deal found 7/10C$ 597
Thu 25/26:30 a.m. -
2 stops10h 15m
Mon 1/32:00 p.m. -
2 stops13h 20m
Deal found 11/10C$ 552
Sat 19/125:59 p.m. -
1 stop8h 56m
Tue 22/127:10 p.m. -
1 stop7h 43m
Deal found 7/10C$ 597
Thu 5/1112:15 a.m. -
1 stop7h 45m
Sun 8/115:00 a.m. -
1 stop8h 40m
Deal found 9/10C$ 566
Direct flights from Seattle to PhiladelphiaExplore direct flight options from Seattle to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 October 2026.
Explore direct flight options from Seattle to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 October 2026.
Mon 9/119:38 p.m. -
Nonstop5h 05m
Sat 14/117:00 a.m. -
Nonstop6h 05m
Deal found 8/10C$ 566
Tue 17/119:38 p.m. -
Nonstop5h 05m
Tue 24/117:00 a.m. -
Nonstop6h 05m
Deal found 8/10C$ 567
Sat 21/119:34 p.m. -
Nonstop5h 06m
Wed 25/117:00 a.m. -
Nonstop6h 07m
Deal found 9/10C$ 569
Sat 5/129:15 a.m. -
Nonstop5h 08m
Mon 4/16:48 p.m. -
Nonstop6h 29m
Deal found 8/10C$ 596
Fri 20/119:38 p.m. -
Nonstop5h 05m
Tue 24/117:00 a.m. -
Nonstop6h 05m
Deal found 9/10C$ 597
Wed 4/119:30 p.m. -
Nonstop5h 14m
Wed 11/117:00 a.m. -
Nonstop6h 05m
Deal found 8/10C$ 602
Thu 19/119:28 p.m. -
Nonstop5h 04m
Tue 1/126:11 p.m. -
Nonstop6h 42m
Deal found 9/10C$ 626
Fri 6/119:28 p.m. -
Nonstop5h 04m
Sat 7/117:02 a.m. -
Nonstop6h 06m
Deal found 9/10C$ 630
Tue 3/119:28 p.m. -
Nonstop5h 04m
Wed 11/115:49 p.m. -
Nonstop6h 10m
Deal found 12/10C$ 637
Mon 23/119:34 p.m. -
Nonstop5h 06m
Tue 24/116:46 p.m. -
Nonstop6h 10m
Deal found 9/10C$ 640
Wed 18/119:28 p.m. -
Nonstop5h 04m
Thu 19/117:02 a.m. -
Nonstop6h 06m
Deal found 8/10C$ 644
Sun 8/119:28 p.m. -
Nonstop5h 04m
Thu 12/117:02 a.m. -
Nonstop6h 06m
Deal found 12/10C$ 646
Last-minute flights from Seattle to PhiladelphiaDiscover last-minute flight deals from Seattle to Philadelphia. Data last updated 12 October 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Philadelphia. Data last updated 12 October 2026 and is based on user searches.
Wed 21/104:27 p.m. -
1 stop29h 49m
Mon 26/108:44 p.m. -
1 stop17h 15m
Deal found 7/10C$ 559
Mon 26/1012:10 a.m. -
1 stop7h 30m
Sat 31/108:15 a.m. -
2 stops13h 00m
Deal found 8/10C$ 516
Mon 26/109:15 p.m. -
2 stops10h 25m
Fri 30/107:10 p.m. -
1 stop8h 30m
Deal found 7/10C$ 553
Mon 26/1012:10 a.m. -
1 stop7h 30m
Wed 28/105:30 a.m. -
1 stop8h 20m
Deal found 8/10C$ 556
Tue 27/106:15 a.m. -
2 stops8h 40m
Sat 14/116:15 a.m. -
2 stops12h 50m
Deal found 8/10C$ 547
Fri 30/107:00 a.m. -
1 stop7h 47m
Sat 7/116:15 a.m. -
2 stops10h 40m
Deal found 9/10C$ 552
Thu 5/111:55 p.m. -
1 stop7h 15m
Thu 12/111:50 p.m. -
1 stop13h 55m
Deal found 8/10C$ 535
Sat 7/116:45 a.m. -
2 stops10h 35m
Fri 13/111:50 p.m. -
2 stops12h 15m
Deal found 8/10C$ 530
Thu 12/1110:40 a.m. -
1 stop9h 09m
Mon 16/114:59 p.m. -
1 stop9h 08m
Deal found 9/10C$ 537
Thu 12/1110:56 p.m. -
1 stop7h 56m
Wed 18/1110:30 a.m. -
2 stops10h 27m
Deal found 11/10C$ 544
Wed 18/116:10 a.m. -
1 stop7h 05m
Wed 18/116:20 p.m. -
1 stop8h 15m
Deal found 8/10C$ 526
One-way flights from Seattle to PhiladelphiaSearch for one-way flight options from Seattle to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.
Search for one-way flight options from Seattle to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.
Thu 17/127:10 p.m. -
1 stop7h 21m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 7/10C$ 291
Wed 18/117:00 a.m. -
1 stop7h 47m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 8/10C$ 298
Wed 11/1111:15 p.m. -
1 stop6h 42m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 12/10C$ 299
Mon 9/115:15 a.m. -
2 stops10h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 8/10C$ 305
Sat 26/128:15 p.m. -
2 stops11h 10m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 8/10C$ 306
Wed 16/126:08 p.m. -
1 stop14h 32m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 10/10C$ 311
Fri 11/121:55 p.m. -
1 stop7h 10m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 7/10C$ 322
Thu 17/126:28 p.m. -
1 stop13h 52m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 10/10C$ 325
Sun 8/119:30 p.m. -
Nonstop5h 14m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 8/10C$ 326
Mon 30/119:34 p.m. -
Nonstop5h 06m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 7/10C$ 328
Wed 28/101:25 p.m. -
1 stop7h 10m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 7/10C$ 334
Thu 11/26:30 a.m. -
2 stops10h 15m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 11/10C$ 335
Find flight deals from Seattle to Philadelphia
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Philadelphia (PHL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 October 2026.
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Philadelphia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 12 October 2026.
Use the filters below to find and compare flights from Seattle to Philadelphia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Sat 9/1
6:00 a.m.-4:19 p.m.
1 stop7h 19m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 299
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Thu 17/12
6:45 a.m.-7:25 p.m.
2 stops9h 40m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 299
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Sat 14/11
1:50 p.m.-11:46 p.m.
1 stop6h 56m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 299
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Tue 10/11
10:40 p.m.-11:03 a.m.
1 stop9h 23m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 299
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Sat 10/4
11:53 p.m.-10:40 a.m.
1 stop7h 47m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 299
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Wed 25/11
5:00 a.m.-8:00 p.m.
2 stops12h 00m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 306
Quickest round-trip
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Fri 6/11
9:28 p.m.-5:32 a.m.
Nonstop5h 04m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 326
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Mon 9/11
9:38 p.m.-5:43 a.m.
Nonstop5h 05m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 326
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Thu 12/11
9:38 p.m.-5:43 a.m.
Nonstop5h 05m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 326
SeattlePhiladelphia
SEA Seattle/Tacoma Intl - PHL Philadelphia
SEAPHL
Seattle/Tacoma Intl
Mon 19/10
12:10 a.m.-10:40 a.m.
1 stop7h 30m
Philadelphia
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 339
Showing 1-10 of 22 resultsSorted by cheapest first
Best time to book a flight from Seattle to Philadelphia
Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Seattle with our price prediction graph.
SEA-PHL
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 Seattle to Philadelphia
Prices
Airlines
How far ahead should I book a flight from Seattle to Philadelphia?
The best time to book flights from Seattle to Philadelphia is 25 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Seattle to Philadelphia?
Currently, January is the cheapest month in which you can book a flight from Seattle to Philadelphia (average of C$ 495). Flying from Seattle to Philadelphia in December is currently the most expensive (average of C$ 758). 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 SEA to PHL?
Find hourly flight availability from Seattle to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 October 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Philadelphia as you normally would.
Reviews of airlines servicing Philadelphia
Get insights into the airlines that provide service to Philadelphia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Philadelphia. Reviews last updated 12 October 2026.
Get a feel of what it's like to fly with Alaska Airlines and American Airlines from Seattle to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Entertainment
7.0
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Entertainment
7.0
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Entertainment
7.0
Overall
7.9
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Related info for your journey
Find useful and relevant information for your journey from Seattle to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Philadelphia?
Book flights to Philadelphia if you plan to visit one of these locationsVoorhees
Reading
King of Prussia
Wildwood
West Chester
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
Complete your trip
Direct flights to Pennsylvania
Flights by cabin class
Other flight options
Other flights from Seattle
Philadelphia flight routes
Popular flights
Alternative routes for Seattle to Philadelphia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Philadelphia by adding a car rental and/or hotel reservation to your travel itinerary.
Direct flights to Pennsylvania
Book a non-stop flight to one of these other cities located in Pennsylvania.
Search flights from Seattle to Philadelphia by cabin class
Find flights from Seattle to Philadelphia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Philadelphia flights
Browse other Seattle and Philadelphia flight options. Last updated on 12 October 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on 12 October 2026.
Other flights to Philadelphia
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 October 2026.
Popular flight searches
Check out other popular destinations found by fellow travellers in 2026
Top 2 airlines flying from Seattle to Philadelphia
Discover the top 2 airlines that operate flights from Seattle to Philadelphia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 12 October 2026.
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 Seattle to Philadelphia?
Cheapflights helps you search for flights from Seattle to Philadelphia via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Seattle to Philadelphia?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to Philadelphia for you. Better yet — we are completely free to use.
Can Cheapflights find flights from Seattle to Philadelphia with no change fees?
Yes, we can. To see specific flights from Seattle to Philadelphia 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 Seattle to Philadelphia become cheaper?
Yes! Start tracking prices for Seattle to Philadelphia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.