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$173+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
Feb 21 — Feb 281
Sat 2/21
Sat 2/28
1 adult, Economy
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Cheap 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 January 22, 2026.

This oojo deal was found by Cheapflights users on 1/21. 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.
Fri 5/226:15 am
YOW
-
SFO
2 stops13h 59m
WestJet
Mon 5/2512:50 pm
SFO
-
YOW
2 stops13h 38m
WestJet
Deal found 1/21$298
This oojo deal was found by Cheapflights users on 1/21. 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 5/276:15 am
YOW
-
SFO
2 stops13h 59m
WestJet
Sun 5/317:30 am
SFO
-
YOW
2 stops13h 50m
WestJet
Deal found 1/21$309
This oojo deal was found by Cheapflights users on 1/20. 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 4/295:15 pm
YOW
-
SFO
2 stops23h 42m
WestJet
Wed 5/67:30 am
SFO
-
YOW
2 stops13h 50m
WestJet
Deal found 1/20$312
This oojo deal was found by Cheapflights users on 1/21. 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 5/135:15 pm
YOW
-
SFO
2 stops23h 42m
WestJet
Wed 5/2012:50 pm
SFO
-
YOW
2 stops13h 38m
WestJet
Deal found 1/21$315
This oojo deal was found by Cheapflights users on 1/20. 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 4/305:15 pm
YOW
-
SFO
2 stops21h 39m
WestJet
Wed 5/67:30 am
SFO
-
YOW
2 stops13h 50m
WestJet
Deal found 1/20$322
This oojo deal was found by Cheapflights users on 1/21. 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 4/295:15 pm
YOW
-
SFO
2 stops23h 42m
WestJet
Sun 5/37:30 am
SFO
-
YOW
2 stops13h 50m
WestJet
Deal found 1/21$324
This oojo deal was found by Cheapflights users on 1/21. 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.
Tue 3/36:00 am
YOW
-
SFO
1 stop9h 10m
WestJet
Thu 3/51:00 pm
SFO
-
YOW
2 stops26h 23m
WestJet
Deal found 1/21$339

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 January 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Trip.com
3 stars

Round-trip from

$298
(oojo)

One-way from

$173

Popular in

December

Cheapest in

May

Average price

$365
Provider with most accurate pricing for Ottawa-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ottawa-San Francisco flights.
Search Deals
From Ottawa to San Francisco
Search Deals
One-way flight from Ottawa to San Francisco
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 2,558,603 searches. Data last updated January 22, 2026.
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

Wed 5/27

6:15 am-5:14 pm

2 stops13h 59m

San Francisco

Sun 5/31

7:30 am-12:20 am

2 stops13h 50m

$309

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 4/29

5:15 pm-1:57 pm

2 stops23h 42m

San Francisco

Wed 5/6

7:30 am-12:20 am

2 stops13h 50m

$312

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 4/30

3:45 pm-9:24 pm

1 stop8h 39m

San Francisco

Wed 5/6

7:30 am-12:20 am

2 stops13h 50m

$314

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 3/3

6:00 am-12:10 pm

1 stop9h 10m

San Francisco

Thu 3/5

1:00 pm-6:23 pm

2 stops26h 23m

$339

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 4/29

3:45 pm-9:24 pm

1 stop8h 39m

San Francisco

Sun 5/3

7:30 am-12:40 am

1 stop14h 10m

$364

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 3/3

6:00 am-12:10 pm

1 stop9h 10m

San Francisco

Thu 3/5

1:45 pm-12:38 am

1 stop7h 53m

$386

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 4/22

5:45 pm-12:10 pm

1 stop21h 25m

San Francisco

Sun 4/26

12:50 pm-5:28 am

2 stops13h 38m

$397

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 2/17

4:15 pm-9:39 pm

2 stops32h 24m

San Francisco

Thu 2/26

10:15 am-2:45 pm

1 stop25h 30m

$400

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 4/21

6:00 am-12:10 pm

1 stop9h 10m

$173

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 4/10

6:00 am-12:10 pm

1 stop9h 10m

$192

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Showing 1-10 of 15 results
1
2

Compare providers for flights from Ottawa to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to San Francisco in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
Trip.comPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ottawa-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-San Francisco flights, Cheapflights users trust Trip.com the most. Trip.com has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 January 16, 2026.

The best time to book flights from Ottawa to San Francisco is 83 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, April is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of $216). Flying from Ottawa to San Francisco in December is currently the most expensive (average of $320). 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.

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 January 22, 2026.
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
412 reviews

Comfort

7.9

Food

7.5

Crew

8.6

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Food

7.5

Crew

8.6

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,192 reviews
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Food

7.5

Crew

8.6

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
WestJet
7.2
Good
3,246 reviews
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Food

7.5

Crew

8.6

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,648 reviews
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Food

7.5

Crew

8.6

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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 13h 59m. The distance from Ottawa to San Francisco is about 2439 mi.

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

    Currently priced at $139, 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 $274, respectively. United Airlines is priced at 61% 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?

    The cheapest airlines for a one-way flight from Ottawa to San Francisco are WestJet ($144), Porter Airlines ($153), and Air Canada ($164).

  • 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, April is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of $216). Flying from Ottawa to San Francisco in December is currently the most expensive (average of $320). 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
South San Francisco
Santa Cruz
Roseville
Santa Clara
Livermore
Watsonville
San Bruno
Daly City
Sunnyvale
Vacaville
Turlock
San Carlos
San Ramon
Manteca
Vallejo
San Lorenzo
Davis
Hollister
Redwood City
Union City

Browse thousands of different options on Cheapflights for your next trip

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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 January 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$139Average$404FlexibilityNo cancel feeOn-time69%
WestJetCheapest$247Average$336FlexibilityNo cancel feeOn-time60%
Porter AirlinesCheapest$274Average$436FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$274Average$405FlexibilityNo cancel feeOn-time67%

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