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Cheap flights from Ottawa to San Francisco from C$ 285

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 29/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
28 Jul — 4 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to San Francisco
Explore the most affordable flight options available from Ottawa to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 June 2026.

Tue 18/812:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Sat 22/81:00 p.m.
SFO
-
YOW
1 stop8h 40m
WestJet
Deal found 27/6C$ 481
Thu 20/86:55 a.m.
YOW
-
SFO
2 stops12h 45m
WestJet
Mon 24/86:00 a.m.
SFO
-
YOW
1 stop10h 20m
WestJet
Deal found 26/6C$ 492
Sat 22/812:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Mon 24/86:00 a.m.
SFO
-
YOW
1 stop10h 20m
WestJet
Deal found 25/6C$ 494
Thu 20/812:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Wed 26/86:00 a.m.
SFO
-
YOW
1 stop10h 20m
WestJet
Deal found 27/6C$ 495
Tue 25/812:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Fri 28/86:00 a.m.
SFO
-
YOW
1 stop8h 15m
WestJet
Deal found 23/6C$ 500
Mon 14/912:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Wed 16/96:05 p.m.
SFO
-
YOW
1 stop8h 30m
WestJet
Deal found 26/6C$ 507
Wed 19/812:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Wed 26/81:00 p.m.
SFO
-
YOW
2 stops20h 30m
WestJet
Deal found 27/6C$ 517
Sat 8/86:00 a.m.
YOW
-
SFO
1 stop9h 00m
WestJet
Sat 15/86:05 p.m.
SFO
-
YOW
1 stop8h 30m
WestJet
Deal found 23/6C$ 521
Thu 1/107:00 a.m.
YOW
-
SFO
1 stop8h 20m
Porter Airlines
Sun 4/101:20 p.m.
SFO
-
YOW
1 stop8h 05m
Porter Airlines
Deal found 24/6C$ 527

Find flight deals from Ottawa to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to San Francisco (SFO). 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 28 June 2026.

Round-trip from

C$ 481

One-way from

C$ 285

Popular in

May

Cheapest in

September

Average price

C$ 612
WestJet
  • WestJet
  • 19/8-26/8
  • 3 total stops
  • 22h 50m total
  • Ottawa to San Francisco
Search Deals
WestJet
  • WestJet
  • 29/8
  • 2 total stops
  • 12h 30m total
  • Ottawa to San Francisco
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to San Francisco 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 629,999 searches. Data last updated 28 June 2026.
Use the filters below to find and compare flights from Ottawa to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 19/8

6:00 a.m.-12:00 p.m.

1 stop9h 00m

San Francisco

Wed 26/8

6:05 p.m.-5:35 a.m.

1 stop8h 30m

C$ 484

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 25/8

12:25 p.m.-9:55 p.m.

2 stops12h 30m

San Francisco

Fri 28/8

6:00 a.m.-5:15 p.m.

1 stop8h 15m

C$ 500

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 28/8

12:25 p.m.-9:55 p.m.

2 stops12h 30m

San Francisco

Tue 1/9

6:00 a.m.-7:20 p.m.

1 stop10h 20m

C$ 548

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 18/9

12:25 p.m.-9:55 p.m.

2 stops12h 30m

San Francisco

Tue 22/9

6:00 a.m.-12:30 p.m.

2 stops27h 30m

C$ 585

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 22/7

6:55 a.m.-4:40 p.m.

2 stops12h 45m

San Francisco

Tue 28/7

6:00 a.m.-5:15 p.m.

1 stop8h 15m

C$ 647

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 22/7

12:25 p.m.-9:55 p.m.

2 stops12h 30m

San Francisco

Wed 29/7

6:05 p.m.-5:35 a.m.

1 stop8h 30m

C$ 711

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 22/7

7:20 a.m.-4:40 p.m.

1 stop12h 20m

San Francisco

Sat 25/7

12:29 a.m.-12:25 p.m.

2 stops32h 56m

C$ 729

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sat 15/8

12:25 p.m.-9:55 p.m.

2 stops12h 30m

San Francisco

Sun 23/8

1:00 p.m.-11:35 a.m.

2 stops19h 35m

C$ 734
Cheapest one-way

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sat 29/8

12:25 p.m.-9:55 p.m.

2 stops12h 30m

C$ 285

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 31/8

6:15 p.m.-12:00 p.m.

2 stops20h 45m

C$ 324

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/6

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from Ottawa to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Ottawa 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 Ottawa to San Francisco

How far ahead should I book a flight from Ottawa to San Francisco?

Booking 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ottawa to San Francisco?

Currently, September is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 501). Flying from Ottawa to San Francisco in May is currently the most expensive (average of C$ 792). 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.

How much does it cost to fly round-trip from Ottawa to San Francisco?

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated 28 June 2026.
Get a feel of what it's like to fly with Porter Airlines,United Airlines, andWestJet from Ottawa to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
441 reviews
Check prices

Boarding

8.2

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Porter Airlines
8.0
Very good
441 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Boarding

8.2

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
United Airlines
7.4
Good
9,899 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Boarding

8.2

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
WestJet
7.2
Good
3,385 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Boarding

8.2

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Air Canada
7.1
Good
11,269 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Boarding

8.2

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to San Francisco. 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 Ottawa to San Francisco?

    For as low as C$ 484, WestJet can have you in San Francisco from Ottawa in 9h. The distance from Ottawa to San Francisco is about 3925 km.

  • What are the cheapest airlines flying from Ottawa to San Francisco round-trip?

    WestJet, at C$ 358, was found to be the cheapest airline from Ottawa to San Francisco.Alternate airlines to your destination round-trip include Porter Airlines and Air Canada. WestJet is priced at 43% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Ottawa to San Francisco one-way?

    C$ 222 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and United Airlines, with prices starting from C$ 260 and C$ 346, respectively.

  • Can I find deals for flights from Ottawa to San Francisco that include hotel bookings?

    Yes. In addition to deals on Ottawa to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to San Francisco?

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

  • Can I find deals for business class flights from Ottawa to San Francisco?

    Yes. Cheapflights offers flight deals from Ottawa to San Francisco 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 Ottawa to San Francisco?

    Currently, September is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 501). Flying from Ottawa to San Francisco in May is currently the most expensive (average of C$ 792). 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

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Clara
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
Novato
Vallejo

Browse thousands of different options on Cheapflights for your next trip

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Fly from Ottawa to San Francisco on these airlines

Choose from the following airlines for your flight from Ottawa to San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 28 June 2026.
Air Canada flights from Ottawa to San Francisco
WestJet flights from Ottawa to San Francisco
United Airlines flights from Ottawa to San Francisco

Top 4 airlines flying from Ottawa to San Francisco

Discover the top 4 airlines that operate flights from Ottawa to San Francisco. 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 629,999 searches. Data last updated 28 June 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 358AverageC$ 489FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 403AverageC$ 579FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 407AverageC$ 752FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 475AverageC$ 632FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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 Ottawa to San Francisco?

When you search for this flight from Ottawa to San Francisco, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to San Francisco?

Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ottawa to San Francisco with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to San Francisco flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ottawa to San Francisco become cheaper?

Of course! You can now track prices for flights from Ottawa to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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