Cheap flights from Ottawa to San Francisco from C$ 252
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 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
23 Dec — 30 Dec1
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 January or May, booked 54 days in advance, depart on a Thursday or Wednesday and return on a Friday
Find 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 23 November 2025.
Tue 16/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Fri 26/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 22/11C$ 543
Mon 8/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Tue 16/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 21/11C$ 612
Sun 14/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Thu 18/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 22/11C$ 618
Tue 9/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Fri 12/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 20/11C$ 647
Sun 14/125:40 a.m.YOW - SFO
1 stop10h 00mMultiple Airlines
Thu 18/1210:45 p.m.SFO - YOW
2 stops46h 57mMultiple Airlines
Deal found 22/11C$ 658
Sat 13/125:00 a.m.YOW - SFO
1 stop8h 50mAir Canada
Thu 1/18:30 a.m.SFO - YOW
1 stop7h 48mAir Canada
Deal found 21/11C$ 677
Mon 8/123:55 p.m.YOW - SFO
1 stop22h 29mMultiple Airlines
Tue 16/126:00 a.m.SFO - YOW
2 stops15h 42mMultiple Airlines
Deal found 23/11C$ 678
Sat 13/125:40 a.m.YOW - SFO
1 stop10h 00mMultiple Airlines
Mon 29/129:30 p.m.SFO - YOW
2 stops40h 55mMultiple Airlines
Deal found 20/11C$ 684
Sat 13/125:40 a.m.YOW - SFO
1 stop10h 00mMultiple Airlines
Fri 19/1210:45 p.m.SFO - YOW
2 stops46h 57mMultiple Airlines
Deal found 22/11C$ 694
Mon 15/122:50 p.m.YOW - SFO
1 stop9h 32mAir Canada
Mon 29/128:30 a.m.SFO - YOW
1 stop7h 48mAir Canada
Deal found 20/11C$ 695
Mon 15/125:40 a.m.YOW - SFO
2 stops34h 56mMultiple Airlines
Thu 25/129:15 p.m.SFO - YOW
1 stop12h 20mMultiple Airlines
Deal found 20/11C$ 699
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 23 November 2025.
Sun 11/16:00 a.m.YOW - SFO
1 stop9h 12mDelta
Sun 18/11:00 p.m.SFO - YOW
1 stop8h 40mDelta
Deal found 23/11C$ 575
Fri 20/26:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Thu 5/31:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 21/11C$ 589
Sat 13/125:00 a.m.YOW - SFO
1 stop8h 50mAir Canada
Thu 1/18:30 a.m.SFO - YOW
1 stop7h 48mAir Canada
Deal found 21/11C$ 677
Thu 2/45:40 a.m.YOW - SFO
3 stops33h 30mWestJet
Fri 10/41:00 p.m.SFO - YOW
2 stops32h 39mWestJet
Deal found 23/11C$ 767
Sun 11/16:00 a.m.YOW - SFO
1 stop9h 12mDelta
Wed 14/15:45 a.m.SFO - YOW
2 stops15h 57mDelta
Deal found 20/11C$ 634
Tue 16/126:20 a.m.YOW - SFO
2 stops11h 56mAir Canada
Thu 25/126:00 a.m.SFO - YOW
1 stop12h 18mAir Canada
Deal found 22/11C$ 767
Mon 23/25:40 a.m.YOW - SFO
2 stops15h 58mDelta
Fri 6/36:00 a.m.SFO - YOW
2 stops15h 40mDelta
Deal found 21/11C$ 698
Thu 4/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Mon 8/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 23/11C$ 826
Tue 17/25:40 a.m.YOW - SFO
2 stops15h 58mDelta
Fri 6/36:00 a.m.SFO - YOW
2 stops15h 40mDelta
Deal found 21/11C$ 698
Sun 11/16:45 a.m.YOW - SFO
1 stop8h 53mPorter Airlines
Wed 14/11:40 p.m.SFO - YOW
1 stop8h 03mPorter Airlines
Deal found 22/11C$ 846
Tue 17/26:00 a.m.YOW - SFO
1 stop9h 10mDelta
Sun 8/31:00 p.m.SFO - YOW
1 stop8h 40mDelta
Deal found 21/11C$ 750
Wed 7/15:40 a.m.YOW - SFO
2 stops15h 58mDelta
Wed 14/15:45 a.m.SFO - YOW
2 stops15h 57mDelta
Deal found 23/11C$ 823
Last-minute flights from Ottawa to San Francisco
Discover last-minute flight deals from Ottawa to San Francisco. Data last updated 23 November 2025 and is based on user searches.
Mon 8/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Tue 16/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 21/11C$ 612
Mon 8/123:55 p.m.YOW - SFO
1 stop22h 29mMultiple Airlines
Tue 16/126:00 a.m.SFO - YOW
2 stops15h 42mMultiple Airlines
Deal found 23/11C$ 678
Tue 9/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Fri 12/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 20/11C$ 647
Sat 13/125:00 a.m.YOW - SFO
1 stop8h 50mAir Canada
Thu 1/18:30 a.m.SFO - YOW
1 stop7h 48mAir Canada
Deal found 21/11C$ 677
Sat 13/125:40 a.m.YOW - SFO
1 stop10h 00mMultiple Airlines
Mon 29/129:30 p.m.SFO - YOW
2 stops40h 55mMultiple Airlines
Deal found 20/11C$ 684
Sat 13/125:40 a.m.YOW - SFO
1 stop10h 00mMultiple Airlines
Fri 19/1210:45 p.m.SFO - YOW
2 stops46h 57mMultiple Airlines
Deal found 22/11C$ 694
Sun 14/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Thu 18/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 22/11C$ 618
Sun 14/125:40 a.m.YOW - SFO
1 stop10h 00mMultiple Airlines
Thu 18/1210:45 p.m.SFO - YOW
2 stops46h 57mMultiple Airlines
Deal found 22/11C$ 658
Mon 15/122:50 p.m.YOW - SFO
1 stop9h 32mAir Canada
Mon 29/128:30 a.m.SFO - YOW
1 stop7h 48mAir Canada
Deal found 20/11C$ 695
Mon 15/125:40 a.m.YOW - SFO
2 stops34h 56mMultiple Airlines
Thu 25/129:15 p.m.SFO - YOW
1 stop12h 20mMultiple Airlines
Deal found 20/11C$ 699
Tue 16/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Fri 26/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 22/11C$ 543
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 23 November 2025.
Tue 20/16:00 a.m.YOW - SFO
1 stop9h 12mWestJet
Deal found 21/11C$ 252
Mon 15/126:00 a.m.YOW - SFO
1 stop10h 30mAir Canada
Deal found 21/11C$ 262
Mon 15/127:15 p.m.YOW - SFO
2 stops19h 57mWestJet
Deal found 21/11C$ 271
Mon 15/127:00 a.m.YOW - SFO
3 stops41h 11mMultiple Airlines
Deal found 21/11C$ 283
Wed 21/15:45 p.m.YOW - SFO
1 stop21h 27mWestJet
Deal found 21/11C$ 285
Thu 19/25:40 a.m.YOW - SFO
3 stops29h 08mMultiple Airlines
Deal found 22/11C$ 289
Thu 19/26:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Deal found 21/11C$ 290
Wed 21/16:45 a.m.YOW - SFO
1 stop8h 53mPorter Airlines
Deal found 22/11C$ 292
Tue 20/16:45 a.m.YOW - SFO
1 stop8h 53mPorter Airlines
Deal found 22/11C$ 293
Tue 20/19:30 a.m.YOW - SFO
2 stops41h 11mMultiple Airlines
Deal found 22/11C$ 299
Sat 21/26:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Deal found 23/11C$ 300
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 23 November 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 23 November 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 11/1
6:00 a.m.-12:12 p.m.
1 stop9h 12m
San Francisco
Sun 18/1
1:00 p.m.-12:40 a.m.
1 stop8h 40m
C$ 575
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Fri 20/2
6:45 a.m.-12:40 p.m.
1 stop8h 55m
San Francisco
Thu 5/3
1:40 p.m.-12:41 a.m.
1 stop8h 01m
C$ 589
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Sun 11/1
6:00 a.m.-12:12 p.m.
1 stop9h 12m
San Francisco
Wed 14/1
5:45 a.m.-12:42 a.m.
2 stops15h 57m
C$ 634
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Sat 13/12
5:00 a.m.-10:50 a.m.
1 stop8h 50m
San Francisco
Thu 1/1
8:30 a.m.-7:18 p.m.
1 stop7h 48m
C$ 677
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Mon 23/2
5:40 a.m.-6:38 p.m.
2 stops15h 58m
San Francisco
Fri 6/3
6:00 a.m.-12:40 a.m.
2 stops15h 40m
C$ 698
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Tue 17/2
5:40 a.m.-6:38 p.m.
2 stops15h 58m
San Francisco
Fri 6/3
6:00 a.m.-12:40 a.m.
2 stops15h 40m
C$ 698
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Tue 17/2
6:00 a.m.-12:10 p.m.
1 stop9h 10m
San Francisco
Sun 8/3
1:00 p.m.-12:40 a.m.
1 stop8h 40m
C$ 750
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Thu 2/4
5:40 a.m.-12:10 p.m.
3 stops33h 30m
San Francisco
Fri 10/4
1:00 p.m.-12:39 a.m.
2 stops32h 39m
C$ 767
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Tue 16/12
6:20 a.m.-3:16 p.m.
2 stops11h 56m
San Francisco
Thu 25/12
6:00 a.m.-9:18 p.m.
1 stop12h 18m
C$ 767
OttawaSan Francisco
YOW - SFO
YOWSFO
Ottawa
Wed 7/1
5:40 a.m.-6:38 p.m.
2 stops15h 58m
San Francisco
Wed 14/1
5:45 a.m.-12:42 a.m.
2 stops15h 57m
C$ 823
Flights are sorted by cheapest round-trip flights first.
Deals found on 21/11
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 21 November 2025.
Booking 54 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$ 310). Flying from Ottawa to San Francisco in October is currently the most expensive (average of C$ 375). 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 23 November 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 57% 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$ 464.
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 23 November 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$ 677, Delta can have you in San Francisco from Ottawa in 8h 50m. 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?
United Airlines, at C$ 340, was found to be the cheapest airline from Ottawa to San Francisco.Alternate airlines to your destination round-trip include Porter Airlines and Air Canada. United Airlines is priced at 34% 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$ 252 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Porter Airlines, with prices starting from C$ 262 and C$ 289, 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$ 310). Flying from Ottawa to San Francisco in October is currently the most expensive (average of C$ 375). 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
Alameda
Redwood City
Burlingame
San Bruno
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 23 November 2025.
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 23 November 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 23 November 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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