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Cheap Flights from Ottawa International to San Francisco International

Compare Ottawa International to San Francisco International flight deals

Find the cheapest month or even day of the year to fly to San Francisco International

Book the best San Francisco International fare with no extra fees

Flight deals from Ottawa International to San Francisco International

Looking for a cheap last-minute deal or the best return flight from Ottawa International to San Francisco International? Find the lowest prices on one-way and return tickets right here.
San Francisco.265 € per passenger.Departing Mon, 18 Aug, returning Tue, 26 Aug.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Mon, 18 Aug, arriving in San Francisco International.Inbound indirect flight with WestJet, departs from San Francisco International on Tue, 26 Aug, arriving in Ottawa International.Price includes taxes and charges.From 265 €, select.
San Francisco.272 € per passenger.Departing Wed, 16 Jul, returning Wed, 23 Jul.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Wed, 16 Jul, arriving in San Francisco International.Inbound indirect flight with WestJet, departs from San Francisco International on Wed, 23 Jul, arriving in Ottawa International.Price includes taxes and charges.From 272 €, select.
San Francisco.272 € per passenger.Departing Fri, 17 Oct, returning Sat, 25 Oct.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Fri, 17 Oct, arriving in San Francisco International.Inbound indirect flight with WestJet, departs from San Francisco International on Sat, 25 Oct, arriving in Ottawa International.Price includes taxes and charges.From 272 €, select.
San Francisco.277 € per passenger.Departing Mon, 1 Sep, returning Sun, 7 Sep.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Mon, 1 Sep, arriving in San Francisco International.Inbound indirect flight with WestJet, departs from San Francisco International on Sun, 7 Sep, arriving in Ottawa International.Price includes taxes and charges.From 277 €, select.
San Francisco.281 € per passenger.Departing Wed, 11 Jun, returning Sun, 15 Jun.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Wed, 11 Jun, arriving in San Francisco International.Inbound indirect flight with WestJet, departs from San Francisco International on Sun, 15 Jun, arriving in Ottawa International.Price includes taxes and charges.From 281 €, select.
San Francisco.296 € per passenger.Departing Mon, 18 Aug, returning Sun, 7 Sep.Return flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departs from Ottawa International on Mon, 18 Aug, arriving in San Francisco International.Inbound indirect flight with Porter Airlines, departs from San Francisco International on Sun, 7 Sep, arriving in Ottawa International.Price includes taxes and charges.From 296 €, select.
San Francisco.297 € per passenger.Departing Fri, 20 Jun, returning Sat, 5 Jul.Return flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departs from Ottawa International on Fri, 20 Jun, arriving in San Francisco International.Inbound indirect flight with Porter Airlines, departs from San Francisco International on Sat, 5 Jul, arriving in Ottawa International.Price includes taxes and charges.From 297 €, select.
San Francisco.317 € per passenger.Departing Tue, 30 Sep, returning Sun, 5 Oct.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Tue, 30 Sep, arriving in San Francisco International.Inbound indirect flight with WestJet, departs from San Francisco International on Sun, 5 Oct, arriving in Ottawa International.Price includes taxes and charges.From 317 €, select.

Find the cheapest month to fly from Ottawa International to San Francisco International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ottawa International to San Francisco International flights are currently cheapest in August.
May
from 873 €
Jun
from 281 €
Jul
from 272 €
Aug
from 265 €
Sep
from 277 €
Oct
from 272 €
Nov
from 404 €
Dec
Find prices
Jan
from 580 €
Feb
Find prices
Mar
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Apr
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Ottawa International to San Francisco International: Alternative routes

Compare routes from Ottawa International to San Francisco below. You may find an airport to fly into that's cheaper, faster, or easier than San Francisco International.

Ottawa to San Francisco: Flight information

The things to know before you go.
Cheapest flight found265 €
Cheapest month to flyAugust

Finding cheap flights from Ottawa International to San Francisco International: Frequently asked questions

The best price we found for a return flight from Ottawa International to San Francisco International is 265 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Ottawa International to San Francisco International. But we found flights with one or more stops from 265 €.
As of May 2025, there are no flights flying from Ottawa International to San Francisco International.
The cheapest month to fly from Ottawa International to San Francisco International is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ottawa International Airport to San Francisco International Airport on Monday, 18 August 2025.
No airlines currently offer direct flights between Ottawa International Airport and San Francisco International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Francisco International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, WestJet offers the cheapest flight tickets to San Francisco International.

Travelling from Ottawa/Macdonald-Cartier International Airport (YOW) to San Francisco International Airport (SFO): what you need to know

  • San Francisco's timezone is UTC-7, making San Francisco three hours behind Ottawa.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you enough time to catch your YOW to SFO flight.

  • During popular months such as July, it's a good idea to get to the airport well in advance. Plan to arrive two hours before a domestic departure and four hours ahead of an international flight when you travel during a high season in general.

How to find the cheapest flights from Ottawa/Macdonald-Cartier International Airport (YOW) to San Francisco International Airport (SFO)

  • Right now, 137 € is the lowest price we've seen for a one-way Ottawa/Macdonald-Cartier International Airport to San Francisco International Airport flight. The best price for a return plane ticket is 265 €. Bear in mind that fares can change due to demand at the time of booking.

  • It's usually best to book ahead of time if you're hoping to get cheap tickets from YOW to SFO. That's because airlines adjust prices based on demand, which tends to increase closer to the date of departure.

  • If you're flexible with your travel plans, use the 'Whole month' search function. It'll find the lowest price in each month when looking for your flight from Ottawa/Macdonald-Cartier International Airport to San Francisco International Airport.

  • Landing cheap flights from YOW to SFO is a piece of cake with Price Alerts. Simply create one of these automatic alerts and we'll let you know when a new discounted fare appears.

  • Secure the perfect flight for you by using the filters. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Ottawa/Macdonald-Cartier International Airport to San Francisco International Airport, use the 'Sort by' function. You can also filter by departure and arrival times, airline, and number of stops.

Handy information about Ottawa/Macdonald-Cartier International Airport (YOW)

  • You'll find YOW at 50 Airport Road.

  • 58.21% of flights taking off from Ottawa/Macdonald-Cartier International Airport land at their destination on schedule.

  • To get to Ottawa/Macdonald-Cartier International Airport from central Ottawa, it takes about 20 minutes if you're going by car. Of course, this depends on traffic. It's approximately 13 kilometres from the airport to the city centre.

  • Taking public transport? Expect a trip time of around 45 minutes.

  • Get your trip off to a leisurely start by staying near YOW. Whether you have an early flight from Ottawa/Macdonald-Cartier International Airport to San Francisco International Airport or want to avoid feeling rushed, these hotels have you covered:

Arriving at San Francisco International Airport (SFO)

Getting from San Francisco International Airport (SFO) to central San Francisco

  • San Francisco International Airport is approximately 21 kilometres from central San Francisco. The drive time takes about 20 minutes.

  • It takes roughly 45 minutes to get there by public transport.

When to fly to San Francisco International Airport (SFO)

  • It's time to plan your trip dates for your flight from Ottawa/Macdonald-Cartier International Airport to San Francisco International Airport. August is the most popular month to visit San Francisco. If you're after a more low-key vibe, go in February.

  • The warmest month in San Francisco is September, with the temperature ranging between 12ºC (54ºF) and 22ºC (72ºF). Lock in your flights from Ottawa/Macdonald-Cartier International Airport to San Francisco International Airport in this month if this is the type of weather you like.

  • January sees average temperatures of between 6ºC (43ºF) and 16ºC (61ºF). Look for cheap tickets from YOW to SFO sometime then if you like cooler conditions.

Explore more of United States

  • You've done San Francisco, now it's time to discover other parts of United States. Journey around 64 kilometres south-east to San Jose to tick off its popular sights. From Winchester Mystery House to Rosicrucian Egyptian Museum and San Jose Museum of Art, there's plenty to keep you busy.

  • If you're eager to discover another major destination in United States, head for Fresno, roughly 257 kilometres south-east of San Francisco. Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden are key highlights.

Plan the rest of your trip from Ottawa to San Francisco

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.