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Cheap flights from Ottawa to San Francisco from C$ 233

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
19 Aug — 26 Aug1
1 adult

Cheapflights Tip: The best prices from Ottawa to San Francisco are usually found in January or May, booked 86 days in advance, depart on a Thursday or Wednesday and return on a Friday

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 14 August 2025.

Round-trip from

C$ 405

One-way from

C$ 233

Popular in

December

Cheapest in

January

Average price

C$ 612
WestJet
  • WestJet
  • 10/9-17/9
  • 3 total stops
  • 20h 54m total
  • Ottawa to San Francisco
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WestJet
  • WestJet
  • 12/9
  • 1 total stop
  • 8h 49m total
  • Ottawa to San Francisco
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 67 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).
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Average for round-trip flights in August 2025
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Find flight deals from Ottawa to San Francisco

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 14 August 2025.

Wed 10/912:20 p.m.YOW - SFO
2 stops12h 04mWestJet
Wed 17/912:50 p.m.SFO - YOW
1 stop8h 50mWestJet
Deal found 13/8C$ 405
Mon 15/96:00 a.m.YOW - SFO
1 stop8h 54mWestJet
Tue 30/912:50 p.m.SFO - YOW
1 stop8h 50mWestJet
Deal found 13/8C$ 408
Sun 21/96:00 a.m.YOW - SFO
1 stop8h 54mWestJet
Wed 24/97:30 a.m.SFO - YOW
2 stops13h 52mWestJet
Deal found 12/8C$ 409
Wed 8/106:00 a.m.YOW - SFO
1 stop8h 54mWestJet
Mon 13/102:45 p.m.SFO - YOW
2 stops22h 34mWestJet
Deal found 13/8C$ 427
Fri 12/93:35 p.m.YOW - SFO
1 stop8h 49mWestJet
Fri 19/92:45 p.m.SFO - YOW
2 stops21h 11mWestJet
Deal found 13/8C$ 429
Sun 12/106:00 a.m.YOW - SFO
1 stop8h 54mMultiple Airlines
Thu 16/1010:15 a.m.SFO - YOW
2 stops17h 30mMultiple Airlines
Deal found 13/8C$ 430
Thu 25/96:00 a.m.YOW - SFO
1 stop18h 24mWestJet
Sat 4/1012:50 p.m.SFO - YOW
1 stop8h 50mWestJet
Deal found 14/8C$ 437
Sat 13/97:15 p.m.YOW - SFO
1 stop19h 39mWestJet
Sat 27/912:50 p.m.SFO - YOW
1 stop8h 50mWestJet
Deal found 14/8C$ 441
Wed 17/912:20 p.m.YOW - SFO
2 stops12h 04mWestJet
Mon 22/92:45 p.m.SFO - YOW
2 stops22h 34mWestJet
Deal found 12/8C$ 443

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 14 August 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

Wed 10/9

12:20 p.m.-9:24 p.m.

2 stops12h 04m

San Francisco

Wed 17/9

12:50 p.m.-12:40 a.m.

1 stop8h 50m

C$ 405

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 15/9

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Tue 30/9

12:50 p.m.-12:40 a.m.

1 stop8h 50m

C$ 408

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 21/9

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Wed 24/9

7:30 a.m.-12:22 a.m.

2 stops13h 52m

C$ 409

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 8/10

12:20 p.m.-9:24 p.m.

2 stops12h 04m

San Francisco

Mon 13/10

2:45 p.m.-4:19 p.m.

2 stops22h 34m

C$ 427

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 14/9

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Fri 19/9

2:45 p.m.-2:56 p.m.

2 stops21h 11m

C$ 429

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 12/9

3:35 p.m.-9:24 p.m.

1 stop8h 49m

San Francisco

Fri 19/9

2:45 p.m.-2:56 p.m.

2 stops21h 11m

C$ 429

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 12/10

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Thu 16/10

10:15 a.m.-6:45 a.m.

2 stops17h 30m

C$ 430

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 25/9

7:50 a.m.-9:24 p.m.

1 stop16h 34m

San Francisco

Sat 4/10

12:50 p.m.-12:40 a.m.

1 stop8h 50m

C$ 437

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 12/9

3:35 p.m.-9:24 p.m.

1 stop8h 49m

C$ 233

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 30/10

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

1 stop9h 12m

C$ 234

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/8

Showing 1-10 of 16 results
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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 8 August 2025.

Booking 86 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, January is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 276). Flying from Ottawa to San Francisco in December is currently the most expensive (average of C$ 368). 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 14 August 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 9% 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 67% 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$ 441.

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 Washington, D.C. (IAD) have the shortest average one-way travel time for 1-stop routes: 8h 29m.

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 22m.

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 14 August 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.
Porter Airlines
8.0
Very good
332 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
332 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,916 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
WestJet
7.2
Good
3,015 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Canada
7.1
Good
9,949 reviews
Porter Airlines
8.0
Very good
332 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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.

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

    WestJet, at C$ 305, was found to be the cheapest airline from Ottawa to San Francisco.Alternate airlines to your destination round-trip include United Airlines and Air Canada. WestJet is priced at 39% lower than the current average price of a flight leaving 3 months from now.

  • 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, January is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 276). Flying from Ottawa to San Francisco in December is currently the most expensive (average of C$ 368). 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
Alameda
Redwood City
Burlingame
San Bruno
South San Francisco
Scotts Valley
Belmont
Novato
Millbrae
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 14 August 2025.
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 14 August 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 305AverageC$ 428FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 333AverageC$ 596FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 336AverageC$ 582FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 341AverageC$ 448FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights

Fly with Cheapflights

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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.

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