Cheap flights from Ottawa to San Francisco from C$ 243
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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
11 Jan — 18 Jan1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Ottawa to San Francisco are usually found in May or April, booked 83 days in advance, depart on a Thursday or Wednesday and return on a Friday
Cheap flight deals from Ottawa to San Francisco
Enter your travel dates to find the best prices.
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 12 December 2025.
Mon 15/127:15 p.m.YOW - SFO
2 stops19h 57mWestJet
Thu 8/11:00 p.m.SFO - YOW
2 stops32h 42mWestJet
Deal found 9/12C$ 803
Mon 22/125:45 p.m.YOW - SFO
1 stop21h 27mMultiple Airlines
Mon 12/11:40 p.m.SFO - YOW
1 stop8h 03mMultiple Airlines
Deal found 10/12C$ 982
Fri 19/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Tue 30/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 11/12C$ 987
Mon 15/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Thu 8/11:40 p.m.SFO - YOW
1 stop8h 03mPorter Airlines
Deal found 9/12C$ 1,003
Fri 19/126:00 a.m.YOW - SFO
1 stop10h 30mAir Canada
Tue 30/128:30 a.m.SFO - YOW
1 stop9h 48mAir Canada
Deal found 9/12C$ 1,026
Mon 22/1210:30 a.m.YOW - SFO
2 stops16h 33mUnited Airlines
Mon 12/18:55 p.m.SFO - YOW
2 stops17h 17mUnited Airlines
Deal found 10/12C$ 1,032
Sun 21/126:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Sun 28/121:00 p.m.SFO - YOW
1 stop8h 40mWestJet
Deal found 10/12C$ 1,051
Tue 23/126:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Sun 4/11:00 p.m.SFO - YOW
2 stops32h 42mWestJet
Deal found 10/12C$ 1,081
Tue 23/129:45 a.m.YOW - SFO
1 stop12h 34mUnited Airlines
Sun 4/111:55 p.m.SFO - YOW
1 stop10h 37mUnited Airlines
Deal found 10/12C$ 1,129
Best flights from Ottawa to San Francisco
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 12 December 2025.
Thu 29/16:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Thu 5/21:00 p.m.SFO - YOW
1 stop8h 40mWestJet
Deal found 11/12C$ 410
Sun 25/15:40 a.m.YOW - SFO
1 stop9h 58mMultiple Airlines
Sun 1/210:15 a.m.SFO - YOW
1 stop25h 30mMultiple Airlines
Deal found 11/12C$ 433
Wed 28/16:45 a.m.YOW - SFO
1 stop8h 53mPorter Airlines
Wed 4/21:40 p.m.SFO - YOW
1 stop8h 03mPorter Airlines
Deal found 11/12C$ 452
Tue 24/26:00 a.m.YOW - SFO
1 stop9h 10mMultiple Airlines
Tue 17/31:40 p.m.SFO - YOW
1 stop8h 01mMultiple Airlines
Deal found 11/12C$ 444
Sun 18/16:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Fri 23/11:00 p.m.SFO - YOW
2 stops32h 42mWestJet
Deal found 10/12C$ 445
Thu 8/19:30 a.m.YOW - SFO
2 stops25h 33mMultiple Airlines
Sun 18/110:15 a.m.SFO - YOW
1 stop25h 30mMultiple Airlines
Deal found 10/12C$ 469
Fri 15/56:15 a.m.YOW - SFO
2 stops13h 59mWestJet
Fri 29/57:30 a.m.SFO - YOW
2 stops13h 52mWestJet
Deal found 11/12C$ 492
Mon 2/25:45 p.m.YOW - SFO
1 stop21h 25mWestJet
Mon 9/21:00 p.m.SFO - YOW
1 stop8h 40mWestJet
Deal found 11/12C$ 496
Sun 18/16:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Tue 20/11:00 p.m.SFO - YOW
1 stop24h 53mWestJet
Deal found 10/12C$ 536
Last-minute flights from Ottawa to San Francisco
Discover last-minute flight deals from Ottawa to San Francisco. Data last updated 12 December 2025 and is based on user searches.
Thu 8/19:30 a.m.YOW - SFO
2 stops25h 33mMultiple Airlines
Sun 18/110:15 a.m.SFO - YOW
1 stop25h 30mMultiple Airlines
Deal found 10/12C$ 469
Tue 13/16:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Sun 1/21:00 p.m.SFO - YOW
1 stop24h 53mWestJet
Deal found 11/12C$ 496
Sun 18/16:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Fri 23/11:00 p.m.SFO - YOW
2 stops32h 42mWestJet
Deal found 10/12C$ 445
Sun 18/16:00 a.m.YOW - SFO
1 stop9h 12mMultiple Airlines
Wed 21/17:55 p.m.SFO - YOW
2 stops45h 10mMultiple Airlines
Deal found 10/12C$ 463
Sun 18/16:45 a.m.YOW - SFO
1 stop8h 53mMultiple Airlines
Fri 23/11:00 p.m.SFO - YOW
1 stop8h 40mMultiple Airlines
Deal found 10/12C$ 483
Sun 25/15:40 a.m.YOW - SFO
1 stop9h 58mMultiple Airlines
Sun 1/210:15 a.m.SFO - YOW
1 stop25h 30mMultiple Airlines
Deal found 11/12C$ 433
Wed 28/16:45 a.m.YOW - SFO
1 stop8h 53mPorter Airlines
Wed 4/21:40 p.m.SFO - YOW
1 stop8h 03mPorter Airlines
Deal found 11/12C$ 418
Thu 29/16:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Thu 5/21:00 p.m.SFO - YOW
1 stop8h 40mWestJet
Deal found 11/12C$ 410
One-way flights from Ottawa to San Francisco
Search for one-way flight options from Ottawa to San Francisco. Find affordable one-way fares based on user searches. Data last updated 12 December 2025.
Sun 25/16:45 a.m.YOW - SFO
1 stop8h 53mPorter Airlines
Deal found 11/12C$ 243
Tue 3/36:00 a.m.YOW - SFO
1 stop9h 10mWestJet
Deal found 9/12C$ 251
Tue 10/26:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Deal found 11/12C$ 259
Mon 12/15:40 a.m.YOW - SFO
2 stops43h 05mMultiple Airlines
Deal found 11/12C$ 266
Mon 12/15:40 a.m.YOW - SFO
3 stops33h 32mWestJet
Deal found 11/12C$ 272
Mon 9/25:40 a.m.YOW - SFO
3 stops33h 30mWestJet
Deal found 10/12C$ 277
Sat 10/18:40 a.m.YOW - SFO
3 stops26h 23mMultiple Airlines
Deal found 11/12C$ 280
Mon 9/26:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Deal found 11/12C$ 281
Mon 9/24:15 p.m.YOW - SFO
3 stops32h 46mMultiple Airlines
Deal found 11/12C$ 285
Wed 7/14:20 p.m.YOW - SFO
2 stops42h 43mMultiple Airlines
Deal found 10/12C$ 290
Sun 11/14:20 p.m.YOW - SFO
2 stops55h 26mMultiple Airlines
Deal found 10/12C$ 291
Fri 9/14:20 p.m.YOW - SFO
2 stops24h 11mMultiple Airlines
Deal found 10/12C$ 294
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 12 December 2025.
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 629,999 searches. Data last updated 12 December 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 29/1
6:00 a.m.-12:12 p.m.
1 stop9h 12m
San Francisco
Thu 5/2
1:00 p.m.-12:40 a.m.
1 stop8h 40m
C$ 410
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Sun 25/1
5:40 a.m.-12:38 p.m.
1 stop9h 58m
San Francisco
Sun 1/2
10:15 a.m.-2:45 p.m.
1 stop25h 30m
C$ 433
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Tue 24/2
6:00 a.m.-12:10 p.m.
1 stop9h 10m
San Francisco
Tue 17/3
1:40 p.m.-12:41 a.m.
1 stop8h 01m
C$ 444
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Sun 18/1
6:00 a.m.-12:12 p.m.
1 stop9h 12m
San Francisco
Fri 23/1
1:00 p.m.-12:42 a.m.
2 stops32h 42m
C$ 445
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Wed 28/1
6:45 a.m.-12:38 p.m.
1 stop8h 53m
San Francisco
Wed 4/2
1:40 p.m.-12:43 a.m.
1 stop8h 03m
C$ 452
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Thu 8/1
9:30 a.m.-8:03 a.m.
2 stops25h 33m
San Francisco
Sun 18/1
10:15 a.m.-2:45 p.m.
1 stop25h 30m
C$ 469
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Fri 15/5
6:15 a.m.-5:14 p.m.
2 stops13h 59m
San Francisco
Fri 29/5
7:30 a.m.-12:22 a.m.
2 stops13h 52m
C$ 492
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Mon 2/2
5:45 p.m.-12:10 p.m.
1 stop21h 25m
San Francisco
Mon 9/2
1:00 p.m.-12:40 a.m.
1 stop8h 40m
C$ 496
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Sun 18/1
6:00 a.m.-12:12 p.m.
1 stop9h 12m
San Francisco
Tue 20/1
1:00 p.m.-4:53 p.m.
1 stop24h 53m
C$ 536
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Sun 25/1
6:45 a.m.-12:38 p.m.
1 stop8h 53m
C$ 243
Flights are sorted by cheapest round-trip flights first.
Deals found on 11/12
Showing 1-10 of 21 results
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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
Prices
More
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 5 December 2025.
Booking 83 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 C$ 301). Flying from Ottawa to San Francisco in December is currently the most expensive (average of C$ 404). 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 12 December 2025.
A simple way to save on the total cost of your ticket is to fly from Ottawa to San Francisco at noon. If you’re flexible enough to do this you can expect to save up to 8% on your trip compared to booking a flight in the evening.
What is the cheapest day to fly from Ottawa to San Francisco?
Use this chart to determine the cheapest time to fly round-trip from Ottawa to San Francisco. Price data was last updated on 16 December 2024.
Travelers seeking maximum savings on their Ottawa to San Francisco flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
What’s the top layover airport for flights from Ottawa to San Francisco?
Share of one-stop round-trip flights from Ottawa to San Francisco chosen by Cheapflights users in the past 12 months, using the same layover each way.
Toronto (YYZ) – chosen by Cheapflights users on 53% of one-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.
Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 452.
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 Montreal (YUL) have the shortest average one-way travel time for 1-stop routes: 8h 16m.
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 Montreal (YUL) offer the fastest connection on this route, with an average layover time of 1h 20m.
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 12 December 2025.
Get a feel of what it's like to fly with Porter Airlines,United Airlines, andWestJet from Ottawa to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
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?
For as low as C$ 452, WestJet can have you in San Francisco from Ottawa in 8h 53m. The distance from Ottawa to San Francisco is about 3925 km. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines flying from Ottawa to San Francisco round-trip?
Porter Airlines, at C$ 323, was found to be the cheapest airline from Ottawa to San Francisco.Alternate airlines to your destination round-trip include WestJet and United Airlines. Porter Airlines is priced at 35% 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?
C$ 203 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and Air Canada, with prices starting from C$ 209 and C$ 228, respectively.
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 C$ 301). Flying from Ottawa to San Francisco in December is currently the most expensive (average of C$ 404). 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.
Book flights to San Francisco if you plan to visit one of these locations
Richmond
Newark
Redwood City
Burlingame
South San Francisco
Scotts Valley
Novato
Santa Clara
Vallejo
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Fly from Ottawa to San Francisco on these airlines
Choose from the following airlines for your flight from Ottawa to San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 12 December 2025.
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 December 2025.
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 629,999 searches. Data last updated 12 December 2025.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Ottawa to San Francisco?
When you search for this flight from Ottawa to San Francisco, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Ottawa to San Francisco?
Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Ottawa to San Francisco with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to San Francisco flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Ottawa to San Francisco become cheaper?
Of course! You can now track prices for flights from Ottawa to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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