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$147+ Cheap flights from Ottawa (YOW) to San Francisco (SFO)

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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Ottawa to San Francisco are usually found in January or May, booked 54 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap 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 September 17, 2025.

Round-trip from

$291
(FlightHub)

One-way from

$147
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$376
From Ottawa to San Francisco
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One-way flight from Ottawa to San Francisco
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Highest demand for flights based on searches. 10% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ottawa to San Francisco

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 September 17, 2025.

This FlightHub deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:15 pmYOW - SFO
1 stop19h 39mWestJet
Tue 10/2112:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 9/16$291
This Trip.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:15 pmYOW - SFO
1 stop19h 39mWestJet
Wed 10/2212:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 9/16$293
This Trip.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:15 pmYOW - SFO
1 stop29h 09mWestJet
Sun 10/1212:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 9/15$296
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/226:05 amYOW - SFO
1 stop10h 45mUnited Airlines
Wed 10/2912:43 amSFO - YOW
2 stops10h 47mUnited Airlines
Deal found 9/16$300
This oojo deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:15 pmYOW - SFO
2 stops31h 09mWestJet
Tue 10/281:00 pmSFO - YOW
2 stops32h 42mWestJet
Deal found 9/15$302
This oojo deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:15 pmYOW - SFO
2 stops31h 09mWestJet
Thu 10/301:00 pmSFO - YOW
2 stops32h 42mWestJet
Deal found 9/16$305
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:29 pmYOW - SFO
1 stop16h 50mUnited Airlines
Fri 10/1711:56 pmSFO - YOW
1 stop11h 17mUnited Airlines
Deal found 9/15$312

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 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Ottawa to San Francisco that are best for you.

Fly from

Ottawa

Fly to

San Francisco

Route

Depart

Return

Price

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 10/30

7:30 pm-1:15 am

1 stop8h 45m

San Francisco

Thu 11/13

7:10 pm-3:23 pm

2 stops17h 13m

$293

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 10/2

7:15 pm-9:24 pm

1 stop29h 09m

San Francisco

Sun 10/12

12:50 pm-12:40 am

1 stop8h 50m

$296

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 10/23

5:15 pm-9:24 pm

2 stops31h 09m

San Francisco

Tue 10/28

1:00 pm-12:42 am

2 stops32h 42m

$302

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 10/2

5:15 am-3:23 pm

2 stops13h 08m

San Francisco

Sat 10/11

12:43 am-3:04 pm

2 stops11h 21m

$325

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 10/30

5:40 am-12:12 pm

2 stops33h 32m

San Francisco

Thu 11/13

1:00 pm-6:21 pm

2 stops26h 21m

$327

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 12/25

12:05 pm-11:05 pm

2 stops14h 00m

San Francisco

Thu 1/1

5:00 am-9:18 pm

1 stop13h 18m

$333

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 12/24

12:05 pm-11:05 pm

2 stops14h 00m

San Francisco

Thu 1/1

5:00 am-9:18 pm

1 stop13h 18m

$333

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 10/14

5:55 am-11:54 am

2 stops32h 59m

San Francisco

Fri 10/17

7:30 am-12:22 am

2 stops13h 52m

$337

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 10/31

6:00 am-12:12 pm

1 stop9h 12m

San Francisco

Thu 11/6

7:30 am-12:41 am

3 stops14h 11m

$351

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sat 1/24

5:40 am-12:12 pm

2 stops33h 32m

San Francisco

Sun 2/1

1:00 pm-6:23 pm

2 stops26h 23m

$369

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 20 results
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?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to San Francisco. Price data was last updated on September 12, 2025.

The best time to book flights from Ottawa to San Francisco is 54 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 Ottawa to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of $276). Flying from Ottawa to San Francisco in June is currently the most expensive (average of $357). 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 YOW to SFO?

Find hourly flight availability from Ottawa to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

It’s typically best to fly out from Ottawa to San Francisco in the afternoon. Doing so could potentially save you 14% on the flight price compared to flying in the morning, which is usually more expensive.

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 September 17, 2025.
Peruse reviews from past customers who have flown with Porter Airlines, United Airlines, and WestJet from Ottawa to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
7.9
Good
365 reviews

Comfort

7.9

Entertainment

7.0

Food

7.6

Overall

7.9

Crew

8.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
7.9
Good
365 reviews
Porter Airlines
7.9
Good
365 reviews

Comfort

7.9

Entertainment

7.0

Food

7.6

Overall

7.9

Crew

8.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,926 reviews
Porter Airlines
7.9
Good
365 reviews

Comfort

7.9

Entertainment

7.0

Food

7.6

Overall

7.9

Crew

8.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
WestJet
7.2
Good
3,095 reviews
Porter Airlines
7.9
Good
365 reviews

Comfort

7.9

Entertainment

7.0

Food

7.6

Overall

7.9

Crew

8.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
7.9
Good
365 reviews

Comfort

7.9

Entertainment

7.0

Food

7.6

Overall

7.9

Crew

8.6

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

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?

    Departing from Ottawa to San Francisco will take you 8h 45m. The distance from Ottawa to San Francisco is about 2439 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $241, United Airlines will fly you from Ottawa to San Francisco and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from WestJet and Porter Airlines - these airlines can fly you to your destination from $247 and $259, respectively. United Airlines is priced at 33% lower than the current average price of a flight leaving 3 months from now.

  • 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, January is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of $276). Flying from Ottawa to San Francisco in June is currently the most expensive (average of $357). 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

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Santa Cruz
Livermore
South San Francisco
Turlock
Antioch
Watsonville
Santa Clara
Manteca
Sunnyvale
Hollister
Vacaville
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San Mateo
San Leandro
Lathrop

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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 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$241Average$491FlexibilityNo cancel feeOn-time69%
WestJetCheapest$247Average$336FlexibilityNo cancel feeOn-time60%
Porter AirlinesCheapest$259Average$409FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$274Average$512FlexibilityNo cancel feeOn-time67%

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