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Cheap flights from Ottawa to San Francisco from C$ 270

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 27/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
24 Aug — 31 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 25 July 2026.

Thu 27/812:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Wed 2/96:00 a.m.
SFO
-
YOW
1 stop8h 15m
WestJet
Deal found 23/7C$ 507
Wed 16/96:55 a.m.
YOW
-
SFO
2 stops12h 45m
WestJet
Wed 30/96:00 a.m.
SFO
-
YOW
1 stop10h 20m
WestJet
Deal found 23/7C$ 508
Mon 19/101:20 p.m.
YOW
-
SFO
1 stop11h 35m
WestJet
Sat 24/101:00 p.m.
SFO
-
YOW
1 stop13h 35m
WestJet
Deal found 23/7C$ 510
Sat 22/86:00 a.m.
YOW
-
SFO
1 stop9h 00m
WestJet
Sat 29/86:00 a.m.
SFO
-
YOW
1 stop20h 35m
WestJet
Deal found 25/7C$ 514
Wed 21/107:00 a.m.
YOW
-
SFO
1 stop8h 20m
Multiple Airlines
Wed 21/106:05 p.m.
SFO
-
YOW
1 stop8h 30m
Multiple Airlines
Deal found 25/7C$ 516
Mon 31/812:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Wed 9/96:00 a.m.
SFO
-
YOW
2 stops15h 20m
WestJet
Deal found 25/7C$ 518
Wed 7/106:55 a.m.
YOW
-
SFO
2 stops12h 45m
WestJet
Tue 13/101:00 p.m.
SFO
-
YOW
2 stops20h 30m
WestJet
Deal found 23/7C$ 520
Thu 3/912:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Thu 10/96:00 a.m.
SFO
-
YOW
1 stop10h 20m
WestJet
Deal found 23/7C$ 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 25 July 2026.

Round-trip from

C$ 507

One-way from

C$ 270

Popular in

July

Cheapest in

September

Average price

C$ 817
WestJet
  • WestJet
  • 27/8-2/9
  • 3 total stops
  • 20h 45m total
  • Ottawa to San Francisco
Search Deals
WestJet
  • WestJet
  • 27/8
  • 1 total stop
  • 9h 00m total
  • Ottawa to San Francisco
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 25 July 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

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 8/9

8:15 p.m.-9:55 p.m.

1 stop28h 40m

San Francisco

Tue 15/9

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

1 stop8h 15m

C$ 528

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 20/8

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

2 stops12h 30m

San Francisco

Mon 24/8

6:00 a.m.-12:20 a.m.

2 stops15h 20m

C$ 535
Quickest round-trip

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 22/10

7:00 a.m.-12:20 p.m.

1 stop8h 20m

San Francisco

Tue 27/10

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 645

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 22/10

7:00 a.m.-12:20 p.m.

1 stop8h 20m

San Francisco

Wed 28/10

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 645

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 27/11

7:00 a.m.-12:45 p.m.

1 stop8h 45m

San Francisco

Sun 29/11

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 663

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 24/11

7:00 a.m.-12:45 p.m.

1 stop8h 45m

San Francisco

Thu 3/12

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 663

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 24/11

7:00 a.m.-12:45 p.m.

1 stop8h 45m

San Francisco

Mon 30/11

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 663

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 25/11

7:00 a.m.-12:45 p.m.

1 stop8h 45m

San Francisco

Wed 2/12

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 663

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 24/11

7:00 a.m.-12:45 p.m.

1 stop8h 45m

San Francisco

Tue 1/12

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 663

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 23/11

7:00 a.m.-12:45 p.m.

1 stop8h 45m

San Francisco

Wed 2/12

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 663

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/7

Showing 1-10 of 23 resultsSorted by cheapest first
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3

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$ 507). Flying from Ottawa to San Francisco in July is currently the most expensive (average of C$ 817). 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?

Airfare is below average for this route at the moment.

Ottawa to San Francisco flights typically cost between C$ 572 and C$ 889 in August.
The cheapest round-trip price found within the last 5 days was C$ 507 on WestJet (27 Aug-2 Sep).

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 25 July 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
448 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
448 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,035 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
WestJet
7.2
Good
3,415 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,383 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Food

7.5

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

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$ 645, WestJet can have you in San Francisco from Ottawa in 8h 20m. The distance from Ottawa to San Francisco is about 3925 km. Both multi-stop and direct flights can be found to your destination and back.

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

    WestJet, at C$ 356, 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$ 220 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 Air Canada, with prices starting from C$ 258 and C$ 272, 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$ 507). Flying from Ottawa to San Francisco in July is currently the most expensive (average of C$ 817). 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 25 July 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 25 July 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 356AverageC$ 510FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 400AverageC$ 577FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 404AverageC$ 741FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 471AverageC$ 627FlexibilityNo 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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