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Cheap flights from Ottawa to San Francisco from C$ 245

YOW — SFO
24 Sep — 1 Oct1
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

Thu 15/1012:25 p.m. -
2 stops12h 30m
Mon 19/106:00 a.m. -
1 stop10h 20m
Deal found 21/8C$ 332
Sun 18/1012:25 p.m. -
2 stops12h 30m
Tue 20/106:00 a.m. -
1 stop10h 20m
Deal found 23/8C$ 339
Mon 19/1012:25 p.m. -
2 stops12h 30m
Wed 21/106:05 p.m. -
1 stop8h 30m
Deal found 24/8C$ 344
Fri 18/912:25 p.m. -
2 stops12h 30m
Mon 21/96:00 a.m. -
1 stop10h 20m
Deal found 24/8C$ 362
Thu 24/912:25 p.m. -
2 stops12h 30m
Mon 28/96:00 a.m. -
1 stop8h 15m
Deal found 23/8C$ 365
Wed 7/106:55 a.m. -
2 stops12h 45m
Wed 21/106:05 p.m. -
1 stop8h 30m
Deal found 23/8C$ 375
Thu 10/912:25 p.m. -
2 stops12h 30m
Tue 15/96:00 a.m. -
1 stop10h 20m
Deal found 21/8C$ 380
Thu 8/1012:25 p.m. -
2 stops12h 30m
Fri 16/106:00 a.m. -
1 stop10h 20m
Deal found 22/8C$ 382
Mon 19/1012:25 p.m. -
2 stops12h 30m
Sat 24/101:00 p.m. -
1 stop13h 35m
Deal found 21/8C$ 383
Thu 15/1012:25 p.m. -
2 stops12h 30m
Sun 18/106:00 a.m. -
1 stop8h 15m
Deal found 21/8C$ 387
Tue 15/94:15 p.m. -
1 stop27h 25m
Tue 22/96:00 a.m. -
1 stop8h 15m
Deal found 23/8C$ 389

Find flight deals from Ottawa to San Francisco

Round-trip from

C$ 332

One-way from

C$ 245

Popular in

July

Cheapest in

September

Average price

C$ 690
WestJet
  • WestJet
  • 15/10-19/10
  • 3 total stops
  • 22h 50m total
  • Ottawa to San Francisco
Search Deals
WestJet
  • WestJet
  • 6/9
  • 1 total stop
  • 9h 00m total
  • Ottawa to San Francisco
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 91 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
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 Ottawa - SFO San Francisco

YOWSFO

Ottawa

Mon 19/10

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

2 stops12h 30m

San Francisco

Sat 24/10

1:00 p.m.-5:35 a.m.

1 stop13h 35m

C$ 387

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Wed 7/10

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

2 stops12h 45m

San Francisco

Tue 13/10

6:00 a.m.-7:20 p.m.

1 stop10h 20m

C$ 400
Quickest round-trip

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Wed 7/10

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

2 stops12h 45m

San Francisco

Mon 12/10

6:00 a.m.-5:15 p.m.

1 stop8h 15m

C$ 436

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Thu 8/10

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

2 stops12h 30m

San Francisco

Sat 17/10

1:00 p.m.-5:35 a.m.

1 stop13h 35m

C$ 451

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Mon 19/10

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

2 stops12h 30m

San Francisco

Wed 21/10

1:00 p.m.-11:35 a.m.

2 stops19h 35m

C$ 523

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Tue 8/9

6:55 a.m.-12:00 p.m.

2 stops32h 05m

San Francisco

Mon 5/10

6:00 a.m.-12:20 a.m.

2 stops15h 20m

C$ 542

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Sat 12/9

6:55 a.m.-6:13 p.m.

2 stops14h 18m

San Francisco

Thu 17/9

6:00 a.m.-7:20 p.m.

1 stop10h 20m

C$ 560

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Thu 22/10

8:15 p.m.-12:00 p.m.

1 stop18h 45m

San Francisco

Sat 31/10

7:08 a.m.-1:00 a.m.

2 stops14h 52m

C$ 597

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Thu 10/9

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

2 stops12h 30m

San Francisco

Sun 13/9

6:00 a.m.-12:20 a.m.

3 stops15h 20m

C$ 646

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Fri 16/10

1:20 p.m.-11:56 p.m.

2 stops13h 36m

San Francisco

Tue 27/10

8:00 a.m.-12:44 a.m.

2 stops13h 44m

C$ 749

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/8

Showing 1-10 of 22 resultsSorted by cheapest first
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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

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?

Booking 71 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, September is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 505). Flying from Ottawa to San Francisco in July is currently the most expensive (average of C$ 802). 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?

Airfare is below average for this route at the moment.

Ottawa to San Francisco flights typically cost between C$ 499 and C$ 915 in October.
The cheapest round-trip price found within the last 5 days was C$ 332 on WestJet (15 Oct-19 Oct).

Reviews of airlines servicing San Francisco

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
458 reviews
Check prices

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
Porter Airlines
8.0
Very good
458 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
United Airlines
7.4
Good
10,125 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
WestJet
7.2
Good
3,437 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
Air Canada
7.1
Good
11,539 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

Related info for your journey

  • How long is the flight from Ottawa to San Francisco?

    For as low as C$ 387, WestJet can have you in San Francisco from Ottawa in 12h 30m. 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$ 349, 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 44% 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$ 216 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$ 257 and C$ 267, 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, September is the cheapest month in which you can book a flight from Ottawa to San Francisco (average of C$ 505). Flying from Ottawa to San Francisco in July is currently the most expensive (average of C$ 802). 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
Santa Clara
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
Novato
Vallejo

Browse thousands of different options on Cheapflights for your next trip

Fly from Ottawa to San Francisco on these airlines

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

AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 349AverageC$ 536FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 393AverageC$ 609FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 397AverageC$ 823FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 462AverageC$ 619FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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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