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$164+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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

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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amYOW - SFO
1 stop9h 12mWestJet
Thu 12/111:00 pmSFO - YOW
1 stop8h 40mWestJet
Deal found 10/29$284
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:40 amYOW - SFO
2 stops17h 23mMultiple Airlines
Thu 12/1110:15 amSFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 10/29$321
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Thu 12/46:45 amYOW - SFO
1 stop8h 55mPorter Airlines
Mon 12/81:40 pmSFO - YOW
1 stop8h 01mPorter Airlines
Deal found 10/29$333
This Trip.com deal was found by Cheapflights users on 10/30. 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 11/206:45 amYOW - SFO
1 stop8h 55mPorter Airlines
Wed 11/261:40 pmSFO - YOW
1 stop7h 59mPorter Airlines
Deal found 10/30$359
This Air Canada deal was found by Cheapflights users on 10/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/222:05 pmYOW - SFO
1 stop10h 29mAir Canada
Tue 12/96:00 pmSFO - YOW
1 stop9h 43mAir Canada
Deal found 10/30$370
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Wed 11/196:45 amYOW - SFO
1 stop8h 55mPorter Airlines
Wed 11/261:40 pmSFO - YOW
1 stop7h 59mPorter Airlines
Deal found 10/29$371
This FlightHub deal was found by Cheapflights users on 10/30. 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 12/236:45 amYOW - SFO
1 stop8h 55mMultiple Airlines
Thu 1/81:00 pmSFO - YOW
1 stop8h 40mMultiple Airlines
Deal found 10/30$387
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Thu 11/136:45 amYOW - SFO
1 stop8h 55mPorter Airlines
Sun 11/161:40 pmSFO - YOW
1 stop7h 59mPorter Airlines
Deal found 10/29$388

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$284
(Kiwi.com)

One-way from

$164
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$362
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. 10% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 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 12/4

6:45 am-12:40 pm

1 stop8h 55m

San Francisco

Mon 12/8

1:40 pm-12:41 am

1 stop8h 01m

$333

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 2/18

6:45 am-12:40 pm

1 stop8h 55m

San Francisco

Mon 3/2

1:40 pm-12:41 am

1 stop8h 01m

$347

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 2/13

9:45 am-9:06 pm

1 stop14h 21m

San Francisco

Mon 3/2

11:59 pm-9:18 pm

1 stop18h 19m

$355

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 2/19

2:15 pm-1:28 am

1 stop14h 13m

San Francisco

Wed 3/4

11:55 pm-1:26 pm

1 stop10h 31m

$355

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sat 2/14

9:45 am-7:25 pm

1 stop12h 40m

San Francisco

Tue 3/3

9:20 pm-2:27 pm

1 stop14h 07m

$355

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 11/19

6:45 am-12:40 pm

1 stop8h 55m

San Francisco

Wed 11/26

1:40 pm-12:39 am

1 stop7h 59m

$371

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 2/19

6:00 am-12:10 pm

1 stop9h 10m

San Francisco

Thu 3/5

1:00 pm-6:23 pm

2 stops26h 23m

$372

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 2/18

5:45 pm-12:10 pm

1 stop21h 25m

San Francisco

Fri 3/6

1:00 pm-12:40 am

1 stop8h 40m

$372

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 1/6

6:45 am-12:40 pm

1 stop8h 55m

San Francisco

Wed 1/21

1:40 pm-12:41 am

1 stop8h 01m

$377

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 2/18

5:40 am-12:10 pm

2 stops33h 30m

San Francisco

Thu 3/5

1:00 pm-12:40 am

1 stop8h 40m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 21 results
1
2
3

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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ottawa-San Francisco flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 October 24, 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, April is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of $219). Flying from Ottawa to San Francisco in October is currently the most expensive (average of $267). 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 October 30, 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 evening, 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 October 30, 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
8.0
Very good
384 reviews

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

7.0

Crew

8.6

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
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

7.0

Crew

8.6

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
8,998 reviews
Porter Airlines
8.0
Very good
384 reviews

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

7.0

Crew

8.6

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
3,149 reviews
Porter Airlines
8.0
Very good
384 reviews

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

7.0

Crew

8.6

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
10,377 reviews
Porter Airlines
8.0
Very good
384 reviews

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

7.0

Crew

8.6

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 55m. 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 $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.

  • 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 Porter Airlines ($192), United Airlines ($204), and WestJet ($206).

  • 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 $219). Flying from Ottawa to San Francisco in October is currently the most expensive (average of $267). 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
South San Francisco
Santa Cruz
Livermore
Turlock
Watsonville
Sunnyvale
Santa Clara
Antioch
Manteca
Vallejo
Hollister
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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$241Average$480FlexibilityNo cancel feeOn-time69%
WestJetCheapest$247Average$336FlexibilityNo cancel feeOn-time60%
Porter AirlinesCheapest$259Average$405FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$274Average$453FlexibilityNo cancel feeOn-time67%

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