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Cheap flights from Ottawa to San Francisco from C$ 242

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 31/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
9 Apr — 16 Apr1
1 adult
1 adult, Economy, 0 bags

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 10 March 2026.

Thu 30/412:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Tue 5/56:00 a.m.
SFO
-
YOW
1 stop8h 15m
WestJet
Deal found 7/3C$ 415
Thu 7/512:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Mon 18/56:00 a.m.
SFO
-
YOW
1 stop8h 15m
WestJet
Deal found 8/3C$ 422
Mon 8/612:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Wed 10/66:05 p.m.
SFO
-
YOW
1 stop8h 30m
WestJet
Deal found 7/3C$ 430
Thu 4/612:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Sun 7/66:05 p.m.
SFO
-
YOW
2 stops15h 25m
WestJet
Deal found 9/3C$ 444
Wed 27/56:15 p.m.
YOW
-
SFO
2 stops30h 40m
WestJet
Sat 6/66:05 p.m.
SFO
-
YOW
1 stop8h 30m
WestJet
Deal found 5/3C$ 445
Fri 8/56:15 p.m.
YOW
-
SFO
2 stops20h 45m
WestJet
Wed 27/56:00 a.m.
SFO
-
YOW
1 stop8h 15m
WestJet
Deal found 9/3C$ 446
Wed 27/57:00 a.m.
YOW
-
SFO
1 stop8h 20m
Multiple Airlines
Sat 6/66:05 p.m.
SFO
-
YOW
1 stop8h 30m
Multiple Airlines
Deal found 5/3C$ 448
Thu 30/412:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Wed 6/51:00 p.m.
SFO
-
YOW
1 stop13h 35m
WestJet
Deal found 7/3C$ 460

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 10 March 2026.

Round-trip from

C$ 415

One-way from

C$ 242

Popular in

December

Cheapest in

May

Average price

C$ 588
WestJet
  • WestJet
  • 30/4-5/5
  • 3 total stops
  • 20h 45m total
  • Ottawa to San Francisco
Search Deals
WestJet
  • WestJet
  • 31/5
  • 2 total stops
  • 12h 30m total
  • Ottawa to San Francisco
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 108 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 629,999 searches. Data last updated 10 March 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

Price

Cheapest round-trip

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 27/5

6:15 p.m.-9:55 p.m.

2 stops30h 40m

San Francisco

Sat 6/6

6:05 p.m.-5:35 a.m.

1 stop8h 30m

C$ 448

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 16/4

6:00 a.m.-12:10 p.m.

1 stop9h 10m

San Francisco

Mon 27/4

1:45 p.m.-12:41 a.m.

1 stop7h 56m

C$ 521

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 3/6

4:15 p.m.-12:00 p.m.

1 stop22h 45m

San Francisco

Sat 6/6

6:05 p.m.-5:35 a.m.

1 stop8h 30m

C$ 536

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 15/4

6:45 p.m.-12:45 p.m.

2 stops21h 00m

San Francisco

Thu 23/4

1:45 p.m.-12:41 a.m.

1 stop7h 56m

C$ 646

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 24/3

5:40 a.m.-7:07 p.m.

2 stops16h 27m

San Francisco

Tue 31/3

8:00 a.m.-12:39 a.m.

2 stops13h 39m

C$ 668
Quickest round-trip

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 26/3

6:45 a.m.-12:42 p.m.

1 stop8h 57m

San Francisco

Sun 29/3

1:45 p.m.-12:38 a.m.

1 stop7h 53m

C$ 703

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 3/4

6:45 p.m.-9:30 a.m.

1 stop17h 45m

San Francisco

Sun 12/4

10:15 a.m.-8:25 a.m.

2 stops19h 10m

C$ 719
Cheapest one-way

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 2/6

6:55 a.m.-4:40 p.m.

2 stops12h 45m

C$ 252

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 9/4

6:00 a.m.-12:10 p.m.

1 stop9h 10m

C$ 277

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 24/5

6:15 p.m.-12:00 p.m.

2 stops20h 45m

C$ 280

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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

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 6 March 2026.

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, February is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 330). Flying from Ottawa to San Francisco in December is currently the most expensive (average of C$ 434). 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?

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 10 March 2026.
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.
Porter Airlines
8.0
Very good
423 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
423 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,409 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
WestJet
7.2
Good
3,288 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,800 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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$ 448, WestJet can have you in San Francisco from Ottawa in 30h 40m. The distance from Ottawa to San Francisco is about 3925 km.

  • What are the cheapest airlines flying from Ottawa to San Francisco round-trip?

    WestJet, at C$ 322, 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. WestJet is priced at 38% 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$ 202 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$ 222 and C$ 224, 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, February is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 330). Flying from Ottawa to San Francisco in December is currently the most expensive (average of C$ 434). 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.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Richmond
Burlingame
South San Francisco
Scotts Valley
Novato
Santa Clara
Vallejo

Browse thousands of different options on Cheapflights for your next trip

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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 10 March 2026.
WestJet flights from Ottawa to San Francisco
Air Canada flights from Ottawa to San Francisco
United Airlines flights from Ottawa to San Francisco

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 10 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 322AverageC$ 429FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 343AverageC$ 507FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 354AverageC$ 577FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 380AverageC$ 587FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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