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$145+ 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 85 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 June 12, 2025.

Round-trip from

$262
(FlightHub)

One-way from

$145
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$334
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. 7% potential increase in price ($30 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 June 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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/12. 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 7/247:15 pmYOW - SFO
2 stops21h 44mWestJet
Sun 8/36:05 pmSFO - YOW
1 stop9h 40mWestJet
Deal found 6/12$262
This Air Canada deal was found by Cheapflights users on 6/12. 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.
Tue 7/229:55 pmYOW - SFO
1 stop15h 38mAir Canada
Tue 8/51:55 pmSFO - YOW
1 stop8h 40mAir Canada
Deal found 6/12$312
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Fri 8/15:45 amYOW - SFO
2 stops21h 14mMultiple Airlines
Sun 8/36:05 pmSFO - YOW
1 stop9h 40mMultiple Airlines
Deal found 6/12$324
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/235:55 amYOW - SFO
2 stops15h 24mDelta
Wed 7/306:05 pmSFO - YOW
1 stop9h 40mDelta
Deal found 6/12$358
This FlightHub deal was found by Cheapflights users on 6/10. 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 8/17:00 amYOW - SFO
1 stop8h 23mPorter Airlines
Sun 8/31:25 pmSFO - YOW
1 stop7h 56mPorter Airlines
Deal found 6/10$419
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 8/286:33 amYOW - SFO
2 stops14h 13mUnited Airlines
Sat 9/612:43 amSFO - YOW
2 stops10h 30mUnited Airlines
Deal found 6/10$548

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 June 12, 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 7/24

7:15 pm-1:59 pm

2 stops21h 44m

San Francisco

Sun 8/3

6:05 pm-6:45 am

1 stop9h 40m

$262

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 7/22

9:55 pm-10:33 am

1 stop15h 38m

San Francisco

Tue 8/5

1:55 pm-1:35 am

1 stop8h 40m

$312

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 8/1

5:45 am-11:59 pm

2 stops21h 14m

San Francisco

Sun 8/3

6:05 pm-6:45 am

1 stop9h 40m

$324

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 7/23

5:55 am-6:19 pm

2 stops15h 24m

San Francisco

Wed 7/30

6:05 pm-6:45 am

1 stop9h 40m

$358

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 8/1

7:00 am-12:23 pm

1 stop8h 23m

San Francisco

Sun 8/3

1:25 pm-12:21 am

1 stop7h 56m

$419

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 8/28

6:33 am-5:46 pm

2 stops14h 13m

San Francisco

Sat 9/6

12:43 am-2:13 pm

2 stops10h 30m

$548

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 8/13

12:20 pm-9:25 pm

2 stops12h 05m

$145

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 9/10

7:00 am-12:23 pm

1 stop8h 23m

$148

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 9/8

6:00 am-11:11 am

1 stop8h 11m

$153

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 7/16

5:45 am-5:20 pm

2 stops14h 35m

$183

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 12 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 June 9, 2025.

The best time to book flights from Ottawa to San Francisco is 85 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 $364). 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 June 12, 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.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 June 12, 2025.
See what other customers who have flown with Porter Airlines, Delta and United Airlines from Ottawa to San Francisco have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
288 reviews

Crew

8.7

Overall

8.0

Boarding

8.2

Comfort

8.1

Food

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Porter Airlines
8.0
Very good
288 reviews
Porter Airlines
8.0
Very good
288 reviews

Crew

8.7

Overall

8.0

Boarding

8.2

Comfort

8.1

Food

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Delta
8.0
Very good
7,946 reviews
Porter Airlines
8.0
Very good
288 reviews

Crew

8.7

Overall

8.0

Boarding

8.2

Comfort

8.1

Food

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
United Airlines
7.4
Good
8,790 reviews
Porter Airlines
8.0
Very good
288 reviews

Crew

8.7

Overall

8.0

Boarding

8.2

Comfort

8.1

Food

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
WestJet
7.2
Good
2,868 reviews
Porter Airlines
8.0
Very good
288 reviews

Crew

8.7

Overall

8.0

Boarding

8.2

Comfort

8.1

Food

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Air Canada
7.1
Good
9,537 reviews
Porter Airlines
8.0
Very good
288 reviews

Crew

8.7

Overall

8.0

Boarding

8.2

Comfort

8.1

Food

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!

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 $262, WestJet will fly you from Ottawa to San Francisco and back. In addition to WestJet, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and Delta - these airlines can fly you to your destination from $312 and $358, respectively. WestJet is priced at 30% 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 ($145), Porter Airlines ($148), and Air Canada ($153).

  • 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 $364). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Roseville
Mountain View
South San Francisco
Livermore
Turlock
Santa Cruz
Manteca
Fairfield
Watsonville
Antioch
Hollister
Milpitas
Newark
Hayward
Alameda
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Daly City
Union City
Campbell
Capitola

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$241Average$555FlexibilityNo cancel feeOn-time69%
Porter AirlinesCheapest$259Average$370FlexibilityNo cancel feeOn-time52%
WestJetCheapest$262Average$370FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$277Average$528FlexibilityNo cancel feeOn-time67%

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