$30+ Cheap flights from Ontario (ONT) to Fremont, CA
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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SFO
Sep 9 — Sep 161
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Fremont with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Ontario to Fremont are usually found in October or September, booked 54 days in advance, depart on a Friday or Thursday and return on a Monday
Cheap flight deals from Ontario to Fremont
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to FremontExplore the most affordable flight options available from Ontario to Fremont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
Explore the most affordable flight options available from Ontario to Fremont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/263:13 pm -
Nonstop1h 27m
Thu 8/279:00 am -
Nonstop1h 29m
Deal found 8/6![Frontier logo]()
$71
This Super.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/278:48 am -
Nonstop1h 27m
Sat 8/299:33 am -
Nonstop1h 29m
Deal found 8/5![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:07 pm -
Nonstop1h 36m
Mon 9/216:02 pm -
Nonstop1h 34m
Deal found 8/6![Frontier logo]()
$73
This Super.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:07 pm -
Nonstop1h 36m
Mon 9/216:02 pm -
Nonstop1h 34m
Deal found 8/8![Frontier logo]()
$76
This Frontier deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:07 pm -
Nonstop1h 36m
Mon 9/216:02 pm -
Nonstop1h 34m
Deal found 8/6![Frontier logo]()
$91
This Frontier deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:07 pm -
Nonstop1h 36m
Mon 9/144:34 pm -
1 stop7h 13m
Deal found 8/6![Frontier logo]()
$96
This Super.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:07 pm -
Nonstop1h 36m
Mon 10/511:17 am -
1 stop5h 42m
Deal found 8/7![Frontier logo]()
$100
This Frontier deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:40 pm -
1 stop4h 16m
Tue 9/812:57 pm -
Nonstop1h 30m
Deal found 8/7![Frontier logo]()
$101
This Frontier deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:07 pm -
Nonstop1h 36m
Wed 9/1611:42 am -
1 stop12h 05m
Deal found 8/5![Frontier logo]()
$102
This Frontier deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/48:48 am -
Nonstop1h 27m
Tue 9/812:57 pm -
Nonstop1h 30m
Deal found 8/5![Frontier logo]()
$103
This Booking.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:07 pm -
Nonstop1h 36m
Mon 9/144:34 pm -
1 stop7h 13m
Deal found 8/5![Frontier logo]()
$104
This Super.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/48:48 am -
Nonstop1h 27m
Sun 9/69:00 am -
Nonstop1h 29m
Deal found 8/5![Frontier logo]()
$105
Best flights from Ontario to FremontDiscover carefully curated flight deals from Ontario to Fremont that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
Discover carefully curated flight deals from Ontario to Fremont that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:52 pm -
Nonstop1h 29m
Mon 9/287:00 pm -
Nonstop1h 31m
Deal found 8/7![United Airlines logo]()
$221
This Southwest deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:05 pm -
2 stops8h 00m
Sat 10/245:00 am -
2 stops6h 10m
Deal found 8/7![Southwest logo]()
$223
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:00 am -
Nonstop1h 29m
Sun 9/610:37 am -
Nonstop1h 35m
Deal found 8/10![United Airlines logo]()
$228
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/234:00 pm -
2 stops6h 40m
Fri 11/275:15 am -
1 stop5h 35m
Deal found 8/10![Southwest logo]()
$258
This United Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/189:01 am -
Nonstop1h 29m
Sat 9/194:40 pm -
Nonstop1h 31m
Deal found 8/6![United Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:30 pm -
1 stop4h 05m
Sun 11/15:15 am -
2 stops7h 45m
Deal found 8/9![Southwest logo]()
$263
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:10 am -
Nonstop1h 33m
Sat 10/38:40 am -
Nonstop1h 43m
Deal found 8/7![United Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:45 am -
2 stops7h 30m
Wed 9/92:35 pm -
2 stops6h 25m
Deal found 8/6![Southwest logo]()
$289
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/212:40 pm -
2 stops5h 55m
Mon 8/312:50 pm -
1 stop4h 35m
Deal found 8/6![Southwest logo]()
$300
This Southwest deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:15 am -
2 stops8h 10m
Sun 9/61:55 pm -
2 stops7h 20m
Deal found 8/8![Southwest logo]()
$337
This Southwest deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/215:10 am -
2 stops10h 35m
Tue 11/245:10 am -
2 stops7h 20m
Deal found 8/8![Southwest logo]()
$344
Last-minute flights from Ontario to FremontDiscover last-minute flight deals from Ontario to Fremont. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Fremont. Data last updated August 10, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/168:58 am -
Nonstop1h 27m
Thu 8/209:00 am -
Nonstop1h 29m
Deal found 8/6![Frontier logo]()
$222
This Super.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:58 am -
Nonstop1h 27m
Thu 8/279:00 am -
Nonstop1h 29m
Deal found 8/6![Frontier logo]()
$177
This Super.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:58 am -
Nonstop1h 27m
Thu 8/209:00 am -
Nonstop1h 29m
Deal found 8/6![Frontier logo]()
$210
This Super.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/183:40 pm -
1 stop4h 16m
Fri 8/289:33 am -
Nonstop1h 29m
Deal found 8/7![Frontier logo]()
$221
This Super.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/193:40 pm -
1 stop4h 16m
Sat 8/299:33 am -
Nonstop1h 29m
Deal found 8/6![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:37 am -
1 stop13h 17m
Thu 8/209:00 am -
Nonstop1h 29m
Deal found 8/6![Frontier logo]()
$214
This Expedia deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:48 am -
Nonstop1h 27m
Sat 8/226:00 am -
1 stop17h 50m
Deal found 8/6![Frontier logo]()
$184
This Super.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:48 am -
Nonstop1h 27m
Thu 8/207:30 pm -
1 stop14h 34m
Deal found 8/6![Frontier logo]()
$218
One-way flights from Ontario to FremontSearch for one-way flight options from Ontario to Fremont. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
Search for one-way flight options from Ontario to Fremont. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Booking.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:07 pm -
Nonstop1h 36m
Deal found 8/7![Frontier logo]()
$30
This Mytrip deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/263:13 pm -
Nonstop1h 27m
Deal found 8/6![Frontier logo]()
$31
This Super.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:07 pm -
Nonstop1h 36m
Deal found 8/10![Frontier logo]()
$33
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/211:38 am -
Nonstop1h 34m
Deal found 8/6![Frontier logo]()
$39
This iWofly deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:48 am -
Nonstop1h 27m
Deal found 8/7![Frontier logo]()
$42
This Frontier deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:11 am -
Nonstop1h 33m
Deal found 8/7![Frontier logo]()
$43
This Frontier deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/177:11 am -
Nonstop1h 33m
Deal found 8/7![Frontier logo]()
$46
This Frontier deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:13 pm -
Nonstop1h 27m
Deal found 8/10![Frontier logo]()
$54
This Super.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/77:11 am -
Nonstop1h 33m
Deal found 8/8![Frontier logo]()
$60
Find flight deals from Ontario to Fremont
Keep the following information in mind while searching for Ontario to Fremont flight deals. Data was last updated August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $71 (Kiwi.com) |
One-way from | $30 (Frontier) |
Popular in | February |
Cheapest in | October |
Average price | $160 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario 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 2,558,603 searches. Data last updated August 10, 2026.
Use the filters below to find and compare flights from Ontario to Fremont that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Thu 9/24
1:52 pm-3:21 pm
Nonstop1h 29m
San Francisco
Mon 9/28
7:00 pm-8:31 pm
Nonstop1h 31m
$221
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Fri 10/23
1:05 pm-9:05 pm
2 stops8h 00m
San Francisco
Sat 10/24
5:00 am-11:10 am
2 stops6h 10m
$223
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 9/5
11:00 am-12:29 pm
Nonstop1h 29m
San Francisco
Sun 9/6
10:37 am-12:12 pm
Nonstop1h 35m
$228
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Mon 11/23
4:00 pm-10:40 pm
2 stops6h 40m
San Francisco
Fri 11/27
5:15 am-10:50 am
1 stop5h 35m
$258
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Fri 9/18
9:01 am-10:30 am
Nonstop1h 29m
San Francisco
Sat 9/19
4:40 pm-6:11 pm
Nonstop1h 31m
$263
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Fri 10/30
1:30 pm-5:35 pm
1 stop4h 05m
San Francisco
Sun 11/1
5:15 am-1:00 pm
2 stops7h 45m
$263
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Fri 9/25
11:10 am-12:43 pm
Nonstop1h 33m
San Francisco
Sat 10/3
8:40 am-10:23 am
Nonstop1h 43m
$263
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Wed 9/9
5:45 am-1:15 pm
2 stops7h 30m
San Francisco
Wed 9/9
2:35 pm-9:00 pm
2 stops6h 25m
$289
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Fri 8/21
2:40 pm-8:35 pm
2 stops5h 55m
San Francisco
Mon 8/31
2:50 pm-7:25 pm
1 stop4h 35m
$300
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 9/5
10:15 am-6:25 pm
2 stops8h 10m
San Francisco
Sun 9/6
1:55 pm-9:15 pm
2 stops7h 20m
$337
Showing 1-10 of 23 resultsSorted by cheapest first
Best time to book a flight from Ontario to Fremont
Have a flexible travel schedule? Discover the best time to fly to Fremont from Ontario with our price prediction graph.
ONT-SFO
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 Ontario to Fremont
ONT-FR8
ONT-SFO
What is the cheapest time of day to fly from ONT to FR8?
Find hourly flight availability from Ontario 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 August 10, 2026.
When flying from Ontario to Fremont, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 23% versus a flight in the morning.
Weekly flight availability from Ontario to Fremont
Explore weekly flight availability from Ontario to Fremont. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 10, 2026.
The most flights from ONT to FR8 are scheduled on a Friday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from Ontario to Fremont?
Airfare is below average for this route at the moment.
Ontario to Fremont flights typically cost between $90 and $245 in September.The cheapest round-trip price found within the last 5 days was $66 on Frontier (Sep 11-Sep 11).
What is the cheapest day to fly from Ontario to Fremont?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Fremont. Price data was last updated on August 1, 2026.
Travelers seeking maximum savings on their Ontario to Fremont flight should consider departing on Saturday at noon 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 August 10, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andUnited Airlines from Ontario to Fremont by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Related info for your journey
Find useful and relevant information for your journey from Ontario to Fremont. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Find flights from Ontario to Fremont, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Fremont flights
Browse other Ontario and Fremont flight options. Last updated on August 10, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on August 10, 2026.
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Ontario to Fremont flights
Consider these flights traveling from Ontario to Fremont.
Top 5 airlines flying from Ontario to Fremont
Discover the top 5 airlines that operate flights from Ontario 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 2,558,603 searches. Data last updated August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$29 | Average$121 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$91 | Average$167 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$94 | Average$239 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$120 | Average$188 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$138 | Average$325 | FlexibilityNo cancel fee | On-time63% |