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Cheap flights from Ottawa to San Francisco from C$ 273

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
5 Dec — 12 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Ottawa to San Francisco are usually found in January or May, booked 54 days in advance, depart on a Thursday or Wednesday and return on a Friday

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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 5 November 2025.

Wed 3/126:45 p.m.YOW - SFO
1 stop17h 45mMultiple Airlines
Sun 7/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 3/11C$ 443
Tue 2/129:30 a.m.YOW - SFO
2 stops34h 21mMultiple Airlines
Sun 7/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 3/11C$ 449
Tue 25/1110:00 a.m.YOW - SFO
2 stops24h 51mMultiple Airlines
Sun 7/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 3/11C$ 458
Thu 4/126:45 p.m.YOW - SFO
2 stops20h 27mMultiple Airlines
Sun 7/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 3/11C$ 459
Tue 25/1110:00 a.m.YOW - SFO
2 stops24h 51mMultiple Airlines
Thu 4/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 3/11C$ 472
Mon 24/116:45 p.m.YOW - SFO
1 stop17h 45mMultiple Airlines
Sun 7/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 3/11C$ 474
Wed 3/126:45 p.m.YOW - SFO
1 stop17h 45mMultiple Airlines
Sat 6/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 3/11C$ 479
Mon 24/116:45 p.m.YOW - SFO
1 stop17h 45mMultiple Airlines
Thu 4/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 3/11C$ 489

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 5 November 2025.

Round-trip from

C$ 443

One-way from

C$ 273

Popular in

December

Cheapest in

January

Average price

C$ 624
3/12-7/12
  • 3/12-7/12
  • 2 total stops
  • 43h 14m total
  • Ottawa to San Francisco
Search Deals
10/12
  • 10/12
  • 1 total stop
  • 17h 45m total
  • Ottawa to San Francisco
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 5 November 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

Mon 12/1

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

1 stop21h 27m

San Francisco

Fri 16/1

1:00 p.m.-12:42 a.m.

2 stops32h 42m

C$ 583

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 15/12

6:45 a.m.-12:40 p.m.

1 stop8h 55m

San Francisco

Thu 25/12

1:40 p.m.-12:41 a.m.

1 stop8h 01m

C$ 607

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 26/11

5:40 a.m.-12:40 p.m.

1 stop10h 00m

San Francisco

Mon 1/12

6:00 a.m.-12:42 a.m.

2 stops15h 42m

C$ 612

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 4/3

6:45 a.m.-12:40 p.m.

1 stop8h 55m

San Francisco

Thu 5/3

1:40 p.m.-12:41 a.m.

1 stop8h 01m

C$ 638

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 24/11

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

2 stops19h 57m

San Francisco

Thu 4/12

1:00 p.m.-6:21 p.m.

2 stops26h 21m

C$ 674

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 24/11

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

2 stops19h 57m

San Francisco

Tue 2/12

1:00 p.m.-12:42 a.m.

2 stops32h 42m

C$ 680

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 14/12

6:45 a.m.-12:40 p.m.

1 stop8h 55m

San Francisco

Thu 25/12

1:40 p.m.-12:41 a.m.

1 stop8h 01m

C$ 694

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 12/12

5:40 a.m.-5:58 p.m.

2 stops15h 18m

San Francisco

Tue 16/12

8:15 a.m.-12:42 a.m.

2 stops13h 27m

C$ 697

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 26/11

5:40 a.m.-2:15 p.m.

2 stops11h 35m

San Francisco

Thu 4/12

7:15 a.m.-12:42 a.m.

2 stops14h 27m

C$ 698

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 24/11

5:40 a.m.-2:15 p.m.

2 stops11h 35m

San Francisco

Sun 7/12

7:15 a.m.-12:42 a.m.

2 stops14h 27m

C$ 698

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 20 results
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 31 October 2025.

Booking 54 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$ 310). Flying from Ottawa to San Francisco in October is currently the most expensive (average of C$ 376). 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 5 November 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 8% 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.

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 5 November 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
387 reviews
Check prices

Entertainment

7.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
Porter Airlines
8.0
Very good
387 reviews
Porter Airlines
8.0
Very good
387 reviews
Check prices

Entertainment

7.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
United Airlines
7.4
Good
9,001 reviews
Porter Airlines
8.0
Very good
387 reviews
Check prices

Entertainment

7.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
WestJet
7.2
Good
3,153 reviews
Porter Airlines
8.0
Very good
387 reviews
Check prices

Entertainment

7.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
Air Canada
7.1
Good
10,404 reviews
Porter Airlines
8.0
Very good
387 reviews
Check prices

Entertainment

7.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.

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$ 607, WestJet can have you in San Francisco from Ottawa in 8h 55m. 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?

    United Airlines, at C$ 340, 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. United Airlines is priced at 33% 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, April is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 310). Flying from Ottawa to San Francisco in October is currently the most expensive (average of C$ 376). 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
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 5 November 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 5 November 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 340AverageC$ 512FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 343AverageC$ 435FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 344AverageC$ 620FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 347AverageC$ 443FlexibilityNo cancel feeOn-time60%
Search WestJet 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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