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Cheap flights from Ottawa to San Francisco from C$ 229

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 23/2. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
26 Feb — 5 Mar1
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 27 January 2026.

Fri 1/56:15 p.m.
YOW
-
SFO
2 stops20h 45m
WestJet
Fri 8/56:00 a.m.
SFO
-
YOW
1 stop8h 20m
WestJet
Deal found 26/1C$ 424
Thu 30/412:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Fri 8/56:00 a.m.
SFO
-
YOW
1 stop8h 20m
WestJet
Deal found 26/1C$ 442
Wed 29/46:15 p.m.
YOW
-
SFO
2 stops30h 40m
WestJet
Wed 6/51:00 p.m.
SFO
-
YOW
2 stops25h 35m
WestJet
Deal found 26/1C$ 448
Fri 1/56:15 p.m.
YOW
-
SFO
2 stops20h 45m
WestJet
Mon 4/56:00 a.m.
SFO
-
YOW
1 stop8h 20m
WestJet
Deal found 26/1C$ 453
Fri 1/57:00 a.m.
YOW
-
SFO
1 stop8h 20m
Multiple Airlines
Mon 4/56:00 a.m.
SFO
-
YOW
1 stop8h 20m
Multiple Airlines
Deal found 26/1C$ 466
Mon 9/37:15 p.m.
YOW
-
SFO
2 stops19h 55m
WestJet
Sun 15/31:00 p.m.
SFO
-
YOW
2 stops26h 23m
WestJet
Deal found 26/1C$ 470
Wed 18/26:40 a.m.
YOW
-
SFO
1 stop9h 05m
Multiple Airlines
Mon 23/210:39 p.m.
SFO
-
YOW
1 stop22h 46m
Multiple Airlines
Deal found 26/1C$ 471
Thu 19/26:40 a.m.
YOW
-
SFO
1 stop9h 05m
Multiple Airlines
Mon 23/22:25 p.m.
SFO
-
YOW
2 stops31h 14m
Multiple Airlines
Deal found 26/1C$ 478

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 27 January 2026.

Round-trip from

C$ 424

One-way from

C$ 229

Popular in

December

Cheapest in

May

Average price

C$ 500
WestJet
  • WestJet
  • 1/5-8/5
  • 3 total stops
  • 29h 05m total
  • Ottawa to San Francisco
Search Deals
Porter Airlines
  • Porter Airlines
  • 23/2
  • 1 total stop
  • 9h 05m total
  • Ottawa to San Francisco
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 106 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 27 January 2026.
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

Fri 1/5

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

2 stops20h 45m

San Francisco

Fri 8/5

1:00 p.m.-12:30 p.m.

2 stops20h 30m

C$ 434

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 1/5

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

2 stops20h 45m

San Francisco

Mon 4/5

6:00 a.m.-5:35 p.m.

2 stops32h 35m

C$ 460

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 1/5

7:00 a.m.-12:20 p.m.

1 stop8h 20m

San Francisco

Mon 4/5

6:00 a.m.-5:20 p.m.

1 stop8h 20m

C$ 466

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 9/3

7:15 p.m.-12:10 p.m.

2 stops19h 55m

San Francisco

Sun 15/3

1:00 p.m.-6:23 p.m.

2 stops26h 23m

C$ 481

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 30/4

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

1 stop9h 00m

San Francisco

Tue 5/5

1:20 p.m.-12:25 a.m.

1 stop8h 05m

C$ 482

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 29/4

5:55 a.m.-12:00 p.m.

2 stops33h 05m

San Francisco

Thu 7/5

1:00 p.m.-12:30 p.m.

2 stops20h 30m

C$ 497

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 30/4

12:25 p.m.-9:55 p.m.

2 stops12h 30m

San Francisco

Thu 7/5

1:00 p.m.-12:30 p.m.

2 stops20h 30m

C$ 497

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 9/3

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

1 stop8h 57m

San Francisco

Sun 15/3

10:15 a.m.-6:23 p.m.

2 stops29h 08m

C$ 500

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 11/5

12:25 p.m.-9:55 p.m.

2 stops12h 30m

San Francisco

Sat 23/5

6:00 a.m.-12:30 p.m.

2 stops27h 30m

C$ 501

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 30/4

5:55 a.m.-12:45 p.m.

1 stop9h 50m

San Francisco

Mon 4/5

9:33 p.m.-12:20 a.m.

2 stops23h 47m

C$ 509

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/1

Showing 1-10 of 22 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

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 23 January 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, April is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 296). Flying from Ottawa to San Francisco in December is currently the most expensive (average of C$ 438). 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.

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 27 January 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
7.9
Good
412 reviews
Check prices

Entertainment

6.9

Crew

8.6

Food

7.5

Overall

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Entertainment

6.9

Crew

8.6

Food

7.5

Overall

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,205 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Entertainment

6.9

Crew

8.6

Food

7.5

Overall

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
WestJet
7.2
Good
3,251 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Entertainment

6.9

Crew

8.6

Food

7.5

Overall

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,660 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Entertainment

6.9

Crew

8.6

Food

7.5

Overall

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

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$ 482, WestJet can have you in San Francisco from Ottawa in 9h. 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$ 319, 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$ 184 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on WestJet and United Airlines, with prices starting from C$ 204 and C$ 229, 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$ 296). Flying from Ottawa to San Francisco in December is currently the most expensive (average of C$ 438). 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
Newark
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 27 January 2026.
Air Canada flights from Ottawa to San Francisco
WestJet 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 27 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 319AverageC$ 442FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
WestJetCheapestC$ 325AverageC$ 428FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 331AverageC$ 535FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 333AverageC$ 509FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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