Cheap flights from Ottawa to San Francisco from C$ 318
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to San Francisco departing on 3/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Find the cheapest flights from Ottawa to San Francisco
Cheap round-trip flights
Cheap one-way flights
Cheap last-minute flights
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Early arrival? Instantly customize your resultsTrusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Porter Airlines flights from Ottawa to San Francisco
Our best Porter Airlines deals on Ottawa to San Francisco flight tickets
WestJet flights from Ottawa to San Francisco
Our best WestJet deals on Ottawa to San Francisco flight tickets
momondo Fare Finder
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
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Tue 1/12
7:00 a.m.-12:47 p.m.
1 stop8h 47m
San Francisco
Thu 3/12
1:45 p.m.-12:41 a.m.
1 stop7h 56m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Thu 26/11
5:30 a.m.-3:50 p.m.
2 stops13h 20m
San Francisco
Mon 7/12
4:40 p.m.-12:01 a.m.
1 stop28h 21m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Wed 28/10
7:00 a.m.-12:45 p.m.
1 stop8h 45m
San Francisco
Wed 18/11
1:45 p.m.-12:37 a.m.
1 stop7h 52m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Thu 26/11
6:10 a.m.-3:50 p.m.
1 stop12h 40m
San Francisco
Mon 7/12
4:40 p.m.-12:01 a.m.
1 stop28h 21m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Tue 27/10
7:00 a.m.-12:45 p.m.
1 stop8h 45m
San Francisco
Wed 18/11
5:07 p.m.-10:15 p.m.
2 stops26h 08m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Sat 31/10
7:00 a.m.-12:45 p.m.
1 stop8h 45m
San Francisco
Wed 18/11
5:07 p.m.-10:15 p.m.
2 stops26h 08m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Fri 13/11
5:10 a.m.-11:10 a.m.
1 stop9h 00m
San Francisco
Fri 13/11
2:00 p.m.-1:40 a.m.
1 stop8h 40m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Wed 28/10
5:30 a.m.-6:17 p.m.
2 stops15h 47m
San Francisco
Tue 17/11
6:00 a.m.-11:40 p.m.
2 stops14h 40m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Sun 1/11
5:10 a.m.-11:10 a.m.
1 stop9h 00m
San Francisco
Sun 8/11
12:00 p.m.-11:55 p.m.
1 stop8h 55m
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Sat 31/10
5:35 a.m.-6:21 p.m.
2 stops15h 46m
San Francisco
Tue 17/11
6:00 a.m.-11:40 p.m.
2 stops14h 40m
See travel insights to San Francisco from
How to get the cheapest flight ticket from Ottawa to San Francisco
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Ottawa and San Francisco?
Prices are currently low for flights on this route.
Typical prices usually range from C$ 612 to C$ 790.The lowest price recently found on this route was C$ 562.
What is the cheapest month to fly to San Francisco?
The cheapest month to fly to San Francisco from Ottawa is in April. Flight prices, which tend to average around C$ 573, are often lower during this time because this is during the off-season. The month of February is another great option to travel to San Francisco, with average flight prices from Ottawa averaging around C$ 576.
How far in advance should I book a flight from Ottawa to San Francisco?
You are more likely to see cheaper flights to San Francisco from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around C$ 670 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Ottawa for as low as C$ 472 on momondo.
Can stopping save me money on Ottawa to San Francisco flights?
You could potentially save up to 19% on your flight if you consider stops on a Ottawa to San Francisco flight.
How have Ottawa to San Francisco flight prices changed over time?
As of October 2026, prices for Ottawa to San Francisco flights are approximately 1% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Ottawa to San Francisco?
Porter Airlines and Air Transat are the most popular carriers operating from Ottawa to San Francisco
Which airlines fly to San Francisco?
Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to San Francisco from Ottawa according to our data. Air Canada is the first choice among our users, with 52% of people opting to fly with this airline when travelling to San Francisco. Keep in mind that there are 5 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.
Which airport is the most popular layover for flights between Ottawa and San Francisco?
Toronto (YYZ) was the most common stop: 78% of momondo users choosing one-stop flights on this route connected there.
Which layover airport offers the lowest fares from Ottawa to San Francisco?
Flights via Calgary (YYC) offer the lowest average round-trip price of C$ 556.
Which layover airport has the shortest travel time from Ottawa to San Francisco?
Flights connecting via Toronto (YYZ) have the shortest average one-way travel time: 8h 56m.
Which layover airport has the shortest connection time from Ottawa to San Francisco?
Toronto (YYZ) has the shortest average layover time for this route: 1h 48m.
When to book flights from Ottawa to San Francisco
Cheap Ottawa to San Francisco (YOW to SFO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ottawa to San Francisco
Frequently asked questions about flying from Ottawa to San Francisco
How far is Ottawa to San Francisco by plane?
Ottawa and San Francisco are 3915.3 km apart from one another. In terms of flight time, this usually takes a little over 8h 20m.
When did momondo last update prices for flights from Ottawa Airport to San Francisco Airport?
Prices for flights from Ottawa Airport to San Francisco Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Ottawa Airport to San Francisco Airport?
There are 5 operators available for flights from Ottawa Airport to San Francisco Airport as of October 2026.
How old do you have to be to fly from Ottawa Airport to San Francisco Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ottawa Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ottawa to San Francisco?
Based on momondo bookings for flights between Ottawa and San Francisco, the leading airline is Porter Airlines, making up 39% of the total bookings. Other popular airlines include WestJet with 27%, Air Canada with 26%, and United Airlines with 5%.
Best airlines flying from Ottawa to San Francisco
Compare and see reviews for airlines that fly from Ottawa to San Francisco with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 382 | Free Cancellation | Rating 7.2 3,449 reviews | |||
| PriceFrom C$ 399 | Free Cancellation | Rating 7.4 10,288 reviews | |||
| PriceFrom C$ 403 | Free Cancellation | Rating 7.1 11,729 reviews | |||
| PriceFrom C$ 405 | Free Cancellation | Rating 8.0 467 reviews | |||
| PriceFrom C$ 783 | Free Cancellation | Rating 7.8 8,634 reviews |
Travelling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ottawa to San Francisco?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from Ottawa.
Can I find flights from Ottawa to San Francisco with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Ottawa to San Francisco flights to just show those with flexible booking policies.
How can momondo help me find flights from Ottawa to San Francisco?
Once all potential Ottawa to San Francisco flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Ottawa to San Francisco right now. Can momondo alert me if prices change?
If you are simply researching potential flights to San Francisco, momondo offers a useful price alert feature which will track prices for flights to San Francisco from Ottawa and alert you when they change.