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Cheap flights from Ottawa to Fremont from C$ 257

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 17/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SFO
19 Nov — 26 Nov1
1 adult
1 adult, Economy

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

Find flight deals from Ottawa to Fremont

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Fremont
Explore the most affordable flight options available from Ottawa to Fremont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 October 2025.

Thu 4/122:50 p.m.YOW - SFO
1 stop9h 32mAir Canada
Mon 8/126:00 p.m.SFO - YOW
1 stop9h 43mAir Canada
Deal found 20/10C$ 498
Wed 12/116:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Mon 17/111:40 p.m.SFO - YOW
1 stop7h 59mPorter Airlines
Deal found 18/10C$ 526
Wed 12/117:45 a.m.YOW - SFO
1 stop10h 50mAir Canada
Wed 19/1111:20 a.m.SFO - YOW
1 stop9h 58mAir Canada
Deal found 20/10C$ 533
Tue 11/113:55 p.m.YOW - SFO
2 stops31h 15mMultiple Airlines
Tue 18/1110:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Deal found 19/10C$ 534
Thu 4/126:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Mon 8/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 19/10C$ 535
Wed 12/116:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Wed 19/111:40 p.m.SFO - YOW
1 stop7h 59mPorter Airlines
Deal found 18/10C$ 540
Sun 9/116:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Sat 15/111:40 p.m.SFO - YOW
1 stop7h 59mPorter Airlines
Deal found 19/10C$ 542
Sun 16/116:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Tue 18/111:40 p.m.SFO - YOW
1 stop7h 59mPorter Airlines
Deal found 20/10C$ 545
Tue 11/116:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Tue 18/111:40 p.m.SFO - YOW
1 stop7h 59mPorter Airlines
Deal found 19/10C$ 547
Sat 22/116:45 a.m.YOW - SFO
1 stop8h 55mPorter Airlines
Tue 9/121:40 p.m.SFO - YOW
1 stop8h 01mPorter Airlines
Deal found 19/10C$ 551

Cheap flight deals from Ottawa to Fremont

Keep the following information in mind while searching for Ottawa to Fremont flight deals. Data was last updated 20 October 2025.

Round-trip from

C$ 408

One-way from

C$ 257

Popular in

December

Cheapest in

January

Average price

C$ 507
WestJet
  • WestJet
  • 16/1-22/1
  • 2 total stops
  • 17h 52m total
  • Ottawa to Fremont
Search Deals
17/1
  • 17/1
  • 2 total stops
  • 35h 09m total
  • Ottawa to Fremont
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to Fremont 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 20 October 2025.
Use the filters below to find and compare flights from Ottawa to Fremont that are best for you.

Fly from

Ottawa

Fly to

Fremont

Route

Depart

Return

Price

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 16/1

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

1 stop9h 12m

San Francisco

Thu 22/1

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

2 stops26h 21m

C$ 460

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 4/3

2:50 p.m.-9:22 p.m.

1 stop9h 32m

San Francisco

Thu 5/3

8:30 a.m.-9:18 p.m.

1 stop9h 48m

C$ 495

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 16/3

2:15 p.m.-9:03 p.m.

1 stop9h 48m

San Francisco

Mon 16/3

11:59 p.m.-10:26 a.m.

1 stop7h 27m

C$ 531

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 20/2

7:30 p.m.-11:30 a.m.

1 stop19h 00m

San Francisco

Thu 12/3

6:00 p.m.-3:00 p.m.

2 stops18h 00m

C$ 533

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 4/12

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

1 stop8h 55m

San Francisco

Mon 8/12

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

1 stop8h 01m

C$ 535

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 12/11

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

1 stop8h 55m

San Francisco

Wed 19/11

1:40 p.m.-12:39 a.m.

1 stop7h 59m

C$ 540

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 9/11

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

1 stop8h 55m

San Francisco

Sat 15/11

1:40 p.m.-12:39 a.m.

1 stop7h 59m

C$ 542

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 16/11

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

1 stop8h 55m

San Francisco

Tue 18/11

1:40 p.m.-12:39 a.m.

1 stop7h 59m

C$ 545

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 16/11

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

1 stop8h 55m

San Francisco

Wed 19/11

1:40 p.m.-12:39 a.m.

1 stop7h 59m

C$ 545

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sat 22/11

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

1 stop8h 55m

San Francisco

Tue 9/12

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

1 stop8h 01m

C$ 551

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/10

Showing 1-10 of 19 results
1
2

Best time to book a flight from Ottawa to Fremont

Have a flexible travel schedule? Discover the best time to fly to Fremont 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 Fremont

How far ahead should I book a flight from Ottawa to Fremont?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Fremont. Price data was last updated on 17 October 2025.

The price you pay for your flight from Ottawa to Fremont may vary depending on when you book. For the best chance of a lower fare, look to book 54 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Ottawa to Fremont?

Currently, April is the cheapest month in which you can book a flight from Ottawa to Fremont (average of C$ 307). Flying from Ottawa to Fremont in October is currently the most expensive (average of C$ 374). 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 FR8?

Find hourly flight availability from Ottawa to Fremont. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 October 2025.

A simple way to save on the total cost of your ticket is to fly from Ottawa to Fremont at noon. If you’re flexible enough to do this you can expect to save up to 27% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Ottawa to Fremont?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to Fremont. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Ottawa to Fremont flight should consider departing on Friday afternoons 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 Fremont

Get insights into the airlines that provide service to Fremont. 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 Fremont. Reviews last updated 20 October 2025.
Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andWestJet from Ottawa to Fremont to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
381 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
8.0
Very good
381 reviews
Porter Airlines
8.0
Very good
381 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,993 reviews
Porter Airlines
8.0
Very good
381 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
WestJet
7.2
Good
3,131 reviews
Porter Airlines
8.0
Very good
381 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,334 reviews
Porter Airlines
8.0
Very good
381 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Fremont. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ottawa to Fremont?

    Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to Fremont. You should not have trouble finding flights to Fremont from Ottawa; the airport handles an average of 0 outbound flights to Fremont per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the Ottawa airport to Fremont. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.

  • How long is the flight from Ottawa to Fremont?

    Airlines like WestJet, Air Canada, and United Airlines fly from Ottawa to Fremont in about 9h 12m. The time it takes to get you to your destination can typically vary by up to 36m. Ottawa and Fremont are separated by a distance of 3925 km. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Ottawa to Fremont that include hotel bookings?

    Yes. In addition to deals on Ottawa to Fremont flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Fremont?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Fremont.

  • Can I find deals for business class flights from Ottawa to Fremont?

    Yes. Cheapflights offers flight deals from Ottawa to Fremont 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 Fremont?

    Currently, April is the cheapest month in which you can book a flight from Ottawa to Fremont (average of C$ 307). Flying from Ottawa to Fremont in October is currently the most expensive (average of C$ 374). 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

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Top 4 airlines flying from Ottawa to Fremont

Discover the top 4 airlines that operate flights from Ottawa to Fremont. 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 20 October 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 338AverageC$ 758FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 340AverageC$ 434FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 342AverageC$ 594FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 346AverageC$ 441FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ottawa to Fremont?

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Can Cheapflights find flights from Ottawa to Fremont with no change fees?

Yes, we can. To see specific flights from Ottawa to Fremont with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ottawa to Fremont become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Fremont from Ottawa today and book when prices fit your budget.

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