$171+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
Sep 16 — Sep 231
Round-trip
1 adult, Economy
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Find cheap flights from Ottawa to San Francisco with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ottawa to San Francisco
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ottawa to San FranciscoExplore 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 17, 2026.
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 17, 2026.
This Trip.com deal was found by Cheapflights users on 8/15. 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.
Fri 8/286:00 am -
1 stop9h 00m
Sat 9/56:05 pm -
1 stop8h 30m
Deal found 8/15![WestJet logo]()
$289
This Trip.com deal was found by Cheapflights users on 8/15. 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.
Fri 9/46:00 am -
1 stop9h 00m
Tue 9/86:00 am -
1 stop10h 20m
Deal found 8/15![WestJet logo]()
$292
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:00 am -
1 stop9h 00m
Sat 9/126:00 am -
1 stop8h 15m
Deal found 8/15![WestJet logo]()
$295
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:00 am -
1 stop9h 00m
Wed 9/96:00 am -
1 stop10h 20m
Deal found 8/14![WestJet logo]()
$314
Best flights from Ottawa to San FranciscoDiscover carefully curated flight deals from Ottawa to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
Discover carefully curated flight deals from Ottawa to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
This flugladen.de deal was found by Cheapflights users on 8/15. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:25 pm -
2 stops12h 30m
Sat 9/56:05 pm -
1 stop8h 30m
Deal found 8/15![WestJet logo]()
$297
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:55 am -
2 stops12h 45m
Mon 10/126:00 am -
1 stop8h 15m
Deal found 8/14![WestJet logo]()
$328
This oojo deal was found by Cheapflights users on 8/16. 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 10/76:55 am -
2 stops12h 45m
Tue 10/136:00 am -
1 stop10h 20m
Deal found 8/16![WestJet logo]()
$328
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/412:25 pm -
2 stops12h 30m
Sat 9/126:00 am -
2 stops26h 35m
Deal found 8/15![WestJet logo]()
$343
This FlightHub deal was found by Cheapflights users on 8/16. 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.
Mon 10/56:50 am -
2 stops18h 05m
Mon 10/126:00 am -
1 stop10h 20m
Deal found 8/16![WestJet logo]()
$354
This FlightHub deal was found by Cheapflights users on 8/16. 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.
Fri 10/212:25 pm -
2 stops12h 30m
Sun 10/111:00 pm -
2 stops20h 30m
Deal found 8/16![WestJet logo]()
$367
This FlightHub deal was found by Cheapflights users on 8/16. 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.
Wed 10/76:55 am -
2 stops12h 45m
Wed 10/211:00 pm -
2 stops19h 35m
Deal found 8/16![WestJet logo]()
$372
Last-minute flights from Ottawa to San FranciscoDiscover last-minute flight deals from Ottawa to San Francisco. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from Ottawa to San Francisco. Data last updated August 17, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 8/15. 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.
Fri 8/286:00 am -
1 stop9h 00m
Sat 9/56:05 pm -
1 stop8h 30m
Deal found 8/15![WestJet logo]()
$289
This Trip.com deal was found by Cheapflights users on 8/15. 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.
Fri 9/46:00 am -
1 stop9h 00m
Tue 9/86:00 am -
1 stop10h 20m
Deal found 8/15![WestJet logo]()
$292
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:00 am -
1 stop9h 00m
Sat 9/126:00 am -
1 stop8h 15m
Deal found 8/15![WestJet logo]()
$295
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:00 am -
1 stop9h 00m
Wed 9/96:00 am -
1 stop10h 20m
Deal found 8/14![WestJet logo]()
$314
One-way flights from Ottawa to San FranciscoSearch for one-way flight options from Ottawa to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
Search for one-way flight options from Ottawa to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:25 pm -
2 stops12h 30m
Deal found 8/14![WestJet logo]()
$171
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:25 pm -
2 stops12h 30m
Deal found 8/13![WestJet logo]()
$172
This Trip.com deal was found by Cheapflights users on 8/16. 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 8/2512:25 pm -
2 stops12h 30m
Deal found 8/16![WestJet logo]()
$174
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.
Thu 9/2412:25 pm -
2 stops12h 30m
Deal found 8/14![WestJet logo]()
$178
This Kissandfly.com deal was found by Cheapflights users on 8/17. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1112:25 pm -
2 stops12h 30m
Deal found 8/17![WestJet logo]()
$186
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 10/812:25 pm -
2 stops12h 30m
Deal found 8/14![WestJet logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Mon 9/147:20 am -
2 stops35h 26m
Deal found 8/12![Multiple Airlines logo]()
$195
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.
Tue 9/221:20 pm -
1 stop11h 35m
Deal found 8/13![WestJet logo]()
$200
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 August 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $289 (Trip.com) |
One-way from | $171 (Kiwi.com) |
Popular in | July |
Cheapest in | September |
Average price | $482 |
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 17, 2026.
Use the filters below to find and compare flights from Ottawa to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Fri 8/28
12:25 pm-9:55 pm
2 stops12h 30m
San Francisco
Sat 9/5
6:05 pm-5:35 am
1 stop8h 30m
$297
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Wed 10/7
6:55 am-4:40 pm
2 stops12h 45m
San Francisco
Mon 10/12
6:00 am-5:15 pm
1 stop8h 15m
$328
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Wed 10/7
6:55 am-4:40 pm
2 stops12h 45m
San Francisco
Tue 10/13
6:00 am-7:20 pm
1 stop10h 20m
$328
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Fri 9/4
12:25 pm-9:55 pm
2 stops12h 30m
San Francisco
Sat 9/12
6:00 am-11:35 am
2 stops26h 35m
$343
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Mon 10/5
6:50 am-9:55 pm
2 stops18h 05m
San Francisco
Mon 10/12
6:00 am-7:20 pm
1 stop10h 20m
$354
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Fri 10/2
12:25 pm-9:55 pm
2 stops12h 30m
San Francisco
Sun 10/11
1:00 pm-12:30 pm
2 stops20h 30m
$367
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Wed 10/7
6:55 am-4:40 pm
2 stops12h 45m
San Francisco
Wed 10/21
1:00 pm-11:35 am
2 stops19h 35m
$372
Cheapest one-way
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Wed 9/30
6:55 am-4:40 pm
2 stops12h 45m
$195
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Fri 9/25
1:20 pm-9:55 pm
1 stop11h 35m
$200
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Fri 9/25
1:20 pm-6:24 pm
2 stops32h 04m
$210
Showing 1-10 of 19 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- 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 FlightHub the most. FlightHub 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.
YOW-SFO
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?
The best time to book flights from Ottawa to San Francisco is 71 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, September is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of $365). Flying from Ottawa to San Francisco in July is currently the most expensive (average of $580). 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.
How much does it cost to fly round-trip from Ottawa to San Francisco?
Airfare is below average for this route at the moment.
Ottawa to San Francisco flights typically cost between $387 and $667 in August.The cheapest round-trip price found within the last 5 days was $289 on WestJet (Aug 28-Sep 5).
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 17, 2026.
Peruse reviews from past customers who have flown with Porter Airlines,United Airlines, andWestJet 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.
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Food
7.6
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentRegan,Aug 2026
YYZ - YVR
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Food
7.6
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentRegan,Aug 2026
YYZ - YVR
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Food
7.6
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentRegan,Aug 2026
YYZ - YVR
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Food
7.6
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentRegan,Aug 2026
YYZ - YVR
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Food
7.6
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentRegan,Aug 2026
YYZ - YVR
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.
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Clara
Santa Cruz
Walnut Creek
San Bruno
Fairfield
Emeryville
Roseville
Burlingame
Rancho Cordova
Vallejo
Cupertino
Newark
Hayward
San Ramon
Redwood City
San Carlos
Manteca
Turlock
San Lorenzo
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Ottawa and San Francisco flights
Browse other Ottawa and San Francisco flight options. Last updated on August 17, 2026.
Other flights from Ottawa
Browse through other flights departing from Ottawa. Flights are based on user searches made on Cheapflights and were last updated on August 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Francisco
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 17, 2026.
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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$263 | Average$387 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$276 | Average$459 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$312 | Average$618 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$335 | Average$672 | FlexibilityNo cancel fee | On-time67% |