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$169+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 86 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 August 14, 2025.

Round-trip from

$293
(FlightHub)

One-way from

$169
(KAYAK)

Popular in

December

Cheapest in

January

Average price

$444
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. 8% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/14. 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.
Sun 10/126:00 amYOW - SFO
1 stop8h 54mWestJet
Thu 10/1612:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 8/14$293
This Trip.com deal was found by Cheapflights users on 8/13. 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.
Wed 9/1012:20 pmYOW - SFO
2 stops12h 04mWestJet
Wed 9/1712:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 8/13$294
This Trip.com deal was found by Cheapflights users on 8/14. 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.
Wed 9/2412:20 pmYOW - SFO
2 stops12h 04mWestJet
Tue 9/3012:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 8/14$295
This Trip.com deal was found by Cheapflights users on 8/13. 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.
Mon 9/156:00 amYOW - SFO
1 stop8h 54mWestJet
Tue 9/3012:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 8/13$296
This FlightHub deal was found by Cheapflights users on 8/13. 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 10/812:20 pmYOW - SFO
2 stops12h 04mWestJet
Mon 10/132:45 pmSFO - YOW
2 stops22h 34mWestJet
Deal found 8/13$310
This FlightHub deal was found by Cheapflights users on 8/13. 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.
Fri 9/123:35 pmYOW - SFO
1 stop8h 49mWestJet
Fri 9/192:45 pmSFO - YOW
2 stops21h 11mWestJet
Deal found 8/13$311
This Trip.com deal was found by Cheapflights users on 8/13. 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.
Sun 10/126:00 amYOW - SFO
1 stop8h 54mMultiple Airlines
Thu 10/1610:15 amSFO - YOW
2 stops17h 30mMultiple Airlines
Deal found 8/13$312
This FlightHub deal was found by Cheapflights users on 8/14. 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 9/256:00 amYOW - SFO
1 stop18h 24mWestJet
Sat 10/412:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 8/14$317
This FlightHub deal was found by Cheapflights users on 8/14. 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.
Sat 9/137:15 pmYOW - SFO
1 stop19h 39mWestJet
Sat 9/2712:50 pmSFO - YOW
1 stop8h 50mWestJet
Deal found 8/14$320

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 August 14, 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

Sun 10/12

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Thu 10/16

12:50 pm-12:40 am

1 stop8h 50m

$293

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 9/10

12:20 pm-9:24 pm

2 stops12h 04m

San Francisco

Wed 9/17

12:50 pm-12:40 am

1 stop8h 50m

$294

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 9/24

12:20 pm-9:24 pm

2 stops12h 04m

San Francisco

Tue 9/30

12:50 pm-12:40 am

1 stop8h 50m

$295

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 9/15

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Tue 9/30

12:50 pm-12:40 am

1 stop8h 50m

$296

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 10/8

12:20 pm-9:24 pm

2 stops12h 04m

San Francisco

Mon 10/13

2:45 pm-4:19 pm

2 stops22h 34m

$310

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 9/14

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Fri 9/19

2:45 pm-2:56 pm

2 stops21h 11m

$311

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 9/12

3:35 pm-9:24 pm

1 stop8h 49m

San Francisco

Fri 9/19

2:45 pm-2:56 pm

2 stops21h 11m

$311

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 10/12

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Thu 10/16

10:15 am-6:45 am

2 stops17h 30m

$312

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 9/25

7:50 am-9:24 pm

1 stop16h 34m

San Francisco

Sat 10/4

12:50 pm-12:40 am

1 stop8h 50m

$317

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 9/8

6:00 am-11:54 am

1 stop8h 54m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 19 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 August 8, 2025.

The best time to book flights from Ottawa to San Francisco is 86 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 $358). 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 August 14, 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.

What’s the top layover airport for flights from Ottawa to San Francisco?

Share of 1-stop round-trip flights from Ottawa to San Francisco chosen by Cheapflights users in the past 12 months, using the same layover each way.

Calgary (YYC) – chosen by Cheapflights users on 50% of 1-stop itineraries from Ottawa to San Francisco on Cheapflights.

What’s the cheapest layover airport for flights from Ottawa to San Francisco?

Average round-trip fare for 1-stop flights from Ottawa to San Francisco, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of $336.

What’s the fastest layover option from Ottawa to San Francisco?

Shortest average travel time for 1-stop one-way flights from Ottawa to San Francisco, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Calgary (YYC) have the shortest average one-way travel time for 1-stop routes: 8h 49m.

Which airport typically offers the quickest layover for flights from Ottawa to San Francisco?

Average layover duration for 1-stop one-way flights from Ottawa to San Francisco, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Calgary (YYC) offer the fastest connection on this route, with an average layover time of 1h 46m.

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 August 14, 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
332 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
332 reviews
Porter Airlines
8.0
Very good
332 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,916 reviews
Porter Airlines
8.0
Very good
332 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
WestJet
7.2
Good
3,015 reviews
Porter Airlines
8.0
Very good
332 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Canada
7.1
Good
9,949 reviews
Porter Airlines
8.0
Very good
332 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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.

  • 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 34% 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 $358). 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
Mountain View
Turlock
Santa Clara
Hollister
Antioch
Watsonville
Manteca
Sunnyvale
Newark
Milpitas
Campbell
Foster City
San Leandro
Burlingame
Redwood City
Vallejo

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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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$241Average$532FlexibilityNo cancel feeOn-time69%
WestJetCheapest$247Average$336FlexibilityNo cancel feeOn-time60%
Porter AirlinesCheapest$259Average$393FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$274Average$503FlexibilityNo cancel feeOn-time67%

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