$63+ Cheap flights from Fremont, CA to Ontario (ONT)
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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ONT
Apr 29 — May 61
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Fremont to Ontario 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 Fremont to Ontario are usually found in May or June, booked 49 days in advance, depart on a Monday or Thursday and return on a Friday
Cheap flight deals from Fremont to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Fremont to OntarioExplore the most affordable flight options available from Fremont to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 30, 2026.
Explore the most affordable flight options available from Fremont to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 30, 2026.
This Frontier deal was found by Cheapflights users on 3/25. 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 4/222:47 pm
SFO
- ONT
1 stop4h 02m
Frontier
Thu 4/239:10 am
ONT
- SFO
Nonstop1h 40m
Frontier
Deal found 3/25![Frontier logo]()
$98
This Frontier deal was found by Cheapflights users on 3/28. 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.
Sat 4/182:47 pm
SFO
- ONT
1 stop4h 02m
Frontier
Sun 4/199:10 am
ONT
- SFO
Nonstop1h 40m
Frontier
Deal found 3/28![Frontier logo]()
$103
This Booking.com deal was found by Cheapflights users on 3/26. 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.
Tue 5/511:26 am
SFO
- ONT
Nonstop1h 39m
Frontier
Tue 5/54:39 pm
ONT
- SFO
1 stop18h 02m
Frontier
Deal found 3/26![Frontier logo]()
$108
This CheapOair deal was found by Cheapflights users on 3/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:18 am
SFO
- ONT
Nonstop1h 34m
Frontier
Fri 4/249:12 am
ONT
- SFO
1 stop12h 21m
Frontier
Deal found 3/26![Frontier logo]()
$114
This Frontier deal was found by Cheapflights users on 3/26. 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 5/511:26 am
SFO
- ONT
Nonstop1h 39m
Frontier
Wed 5/68:17 pm
ONT
- SFO
Nonstop1h 38m
Frontier
Deal found 3/26![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 6/19:34 am
SFO
- ONT
Nonstop1h 32m
Frontier
Tue 6/98:33 pm
ONT
- SFO
Nonstop1h 32m
Frontier
Deal found 3/28![Frontier logo]()
$120
This Frontier deal was found by Cheapflights users on 3/26. 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 5/2611:15 am
SFO
- ONT
Nonstop1h 39m
Frontier
Sat 5/308:17 pm
ONT
- SFO
Nonstop1h 38m
Frontier
Deal found 3/26![Frontier logo]()
$121
This Frontier deal was found by Cheapflights users on 3/27. 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 4/169:18 am
SFO
- ONT
Nonstop1h 34m
Frontier
Fri 4/179:12 am
ONT
- SFO
1 stop12h 01m
Frontier
Deal found 3/27![Frontier logo]()
$123
This Frontier deal was found by Cheapflights users on 3/28. 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.
Sat 5/22:47 pm
SFO
- ONT
1 stop4h 02m
Frontier
Sun 5/39:19 am
ONT
- SFO
Nonstop1h 40m
Frontier
Deal found 3/28![Frontier logo]()
$124
This CheapOair deal was found by Cheapflights users on 3/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:40 pm
SFO
- ONT
1 stop15h 04m
Frontier
Thu 4/239:10 am
ONT
- SFO
Nonstop1h 40m
Frontier
Deal found 3/27![Frontier logo]()
$126
This Frontier deal was found by Cheapflights users on 3/27. 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 5/2711:15 am
SFO
- ONT
Nonstop1h 39m
Frontier
Mon 6/18:17 pm
ONT
- SFO
Nonstop1h 38m
Frontier
Deal found 3/27![Frontier logo]()
$127
Best flights from Fremont to OntarioDiscover carefully curated flight deals from Fremont to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 30, 2026.
Discover carefully curated flight deals from Fremont to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 30, 2026.
This Southwest deal was found by Cheapflights users on 3/29. 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.
Thu 5/75:05 am
SFO
- ONT
1 stop6h 15m
Southwest
Mon 5/113:00 pm
ONT
- SFO
2 stops7h 10m
Southwest
Deal found 3/29![Southwest logo]()
$202
This United Airlines deal was found by Cheapflights users on 3/29. 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 5/28:10 am
SFO
- ONT
Nonstop1h 31m
United Airlines
Mon 5/410:37 am
ONT
- SFO
Nonstop1h 30m
United Airlines
Deal found 3/29![United Airlines logo]()
$246
This Southwest deal was found by Cheapflights users on 3/29. 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.
Thu 4/235:05 am
SFO
- ONT
1 stop6h 15m
Southwest
Thu 4/303:00 pm
ONT
- SFO
2 stops7h 10m
Southwest
Deal found 3/29![Southwest logo]()
$246
This United Airlines deal was found by Cheapflights users on 3/29. 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 5/210:52 am
SFO
- ONT
Nonstop1h 30m
United Airlines
Sat 5/26:59 pm
ONT
- SFO
Nonstop1h 29m
United Airlines
Deal found 3/29![United Airlines logo]()
$247
This United Airlines deal was found by Cheapflights users on 3/26. 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 4/2510:50 am
SFO
- ONT
Nonstop1h 30m
United Airlines
Mon 4/276:00 am
ONT
- SFO
Nonstop1h 29m
United Airlines
Deal found 3/26![United Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 3/26. 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 4/228:55 am
SFO
- ONT
2 stops6h 10m
Southwest
Mon 4/273:00 pm
ONT
- SFO
2 stops7h 10m
Southwest
Deal found 3/26![Southwest logo]()
$295
This Southwest deal was found by Cheapflights users on 3/26. 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.
Thu 7/235:00 am
SFO
- ONT
2 stops6h 20m
Southwest
Mon 7/275:15 am
ONT
- SFO
1 stop6h 45m
Southwest
Deal found 3/26![Southwest logo]()
$304
This United Airlines deal was found by Cheapflights users on 3/25. 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 4/184:10 pm
SFO
- ONT
Nonstop1h 37m
United Airlines
Sun 4/2611:05 am
ONT
- SFO
Nonstop1h 30m
United Airlines
Deal found 3/25![United Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 3/25. 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 6/126:45 pm
SFO
- ONT
1 stop5h 20m
Southwest
Sun 6/142:35 pm
ONT
- SFO
1 stop9h 35m
Southwest
Deal found 3/25![Southwest logo]()
$343
Last-minute flights from Fremont to OntarioDiscover last-minute flight deals from Fremont to Ontario. Data last updated March 30, 2026 and is based on user searches.
Discover last-minute flight deals from Fremont to Ontario. Data last updated March 30, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/25. 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.
Sun 4/510:57 pm
SFO
- ONT
1 stop9h 07m
Frontier
Wed 4/2911:44 am
ONT
- SFO
1 stop7h 01m
Frontier
Deal found 3/25![Frontier logo]()
$185
This Gotogate deal was found by Cheapflights users on 3/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/510:57 pm
SFO
- ONT
1 stop21h 10m
Frontier
Sun 4/126:10 pm
ONT
- SFO
1 stop27h 13m
Frontier
Deal found 3/27![Frontier logo]()
$205
This Frontier deal was found by Cheapflights users on 3/28. 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 4/63:10 pm
SFO
- ONT
1 stop4h 57m
Frontier
Thu 4/169:10 am
ONT
- SFO
Nonstop1h 40m
Frontier
Deal found 3/28![Frontier logo]()
$194
This Booking.com deal was found by Cheapflights users on 3/26. 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.
Tue 4/79:00 pm
SFO
- ONT
1 stop26h 56m
Frontier
Sun 4/1912:59 am
ONT
- SFO
1 stop8h 14m
Frontier
Deal found 3/26![Frontier logo]()
$188
This Gotogate deal was found by Cheapflights users on 3/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/79:00 pm
SFO
- ONT
1 stop26h 56m
Frontier
Thu 4/98:49 am
ONT
- SFO
Nonstop1h 46m
Frontier
Deal found 3/26![Frontier logo]()
$190
This Gotogate deal was found by Cheapflights users on 3/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:00 am
SFO
- ONT
1 stop17h 56m
Frontier
Fri 4/179:12 am
ONT
- SFO
1 stop12h 01m
Frontier
Deal found 3/27![Frontier logo]()
$193
This Booking.com deal was found by Cheapflights users on 3/27. 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.
Tue 4/79:00 pm
SFO
- ONT
1 stop26h 56m
Frontier
Thu 4/169:10 am
ONT
- SFO
Nonstop1h 40m
Frontier
Deal found 3/27![Frontier logo]()
$197
This CheapOair deal was found by Cheapflights users on 3/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:00 am
SFO
- ONT
1 stop17h 56m
Frontier
Thu 4/98:49 am
ONT
- SFO
Nonstop1h 46m
Frontier
Deal found 3/25![Frontier logo]()
$150
This Expedia deal was found by Cheapflights users on 3/25. 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.
Wed 4/86:00 am
SFO
- ONT
1 stop17h 56m
Frontier
Fri 4/108:49 am
ONT
- SFO
Nonstop1h 46m
Frontier
Deal found 3/25![Frontier logo]()
$199
One-way flights from Fremont to OntarioSearch for one-way flight options from Fremont to Ontario. Find affordable one-way fares based on user searches. Data last updated March 30, 2026.
Search for one-way flight options from Fremont to Ontario. Find affordable one-way fares based on user searches. Data last updated March 30, 2026.
This iWofly deal was found by Cheapflights users on 3/28. 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.
Wed 5/611:26 am
SFO
- ONT
Nonstop1h 39m
Frontier
Deal found 3/28![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 3/28. 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.
Thu 4/239:18 am
SFO
- ONT
Nonstop1h 34m
Frontier
Deal found 3/28![Frontier logo]()
$68
This Frontier deal was found by Cheapflights users on 3/29. 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 4/309:18 am
SFO
- ONT
Nonstop1h 34m
Frontier
Deal found 3/29![Frontier logo]()
$69
This Frontier deal was found by Cheapflights users on 3/27. 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 4/222:47 pm
SFO
- ONT
1 stop4h 02m
Frontier
Deal found 3/27![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 4/208:35 pm
SFO
- ONT
1 stop22h 14m
Frontier
Deal found 3/26![Frontier logo]()
$71
This Super.com deal was found by Cheapflights users on 3/26. 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 6/3011:12 am
SFO
- ONT
Nonstop1h 30m
Frontier
Deal found 3/26![Frontier logo]()
$74
This Super.com deal was found by Cheapflights users on 3/28. 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.
Sat 5/910:40 pm
SFO
- ONT
1 stop16h 29m
Frontier
Deal found 3/28![Frontier logo]()
$75
This Frontier deal was found by Cheapflights users on 3/25. 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.
Sat 5/2312:52 pm
SFO
- ONT
1 stop10h 57m
Frontier
Deal found 3/25![Frontier logo]()
$76
This Booking.com deal was found by Cheapflights users on 3/25. 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.
Thu 4/1611:56 am
SFO
- ONT
1 stop19h 35m
Frontier
Deal found 3/25![Frontier logo]()
$77
Find flight deals from Fremont to Ontario
Keep the following information in mind while searching for Fremont to Ontario flight deals. Data was last updated March 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $98 (Frontier) |
One-way from | $63 (iWofly) |
Popular in | February |
Cheapest in | May |
Average price | $237 |
Cheapflights Fare Finder
Customize your flight search to find flights from Fremont to Ontario 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 March 30, 2026.
Use the filters below to find and compare flights from Fremont to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Thu 5/7
5:05 am-11:20 am
1 stop6h 15m
Ontario
Mon 5/11
3:00 pm-10:10 pm
2 stops7h 10m
$202
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Sat 5/2
8:10 am-9:41 am
Nonstop1h 31m
Ontario
Mon 5/4
10:37 am-12:07 pm
Nonstop1h 30m
$246
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Thu 4/23
5:05 am-11:20 am
1 stop6h 15m
Ontario
Thu 4/30
3:00 pm-10:10 pm
2 stops7h 10m
$246
Quickest round-trip
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Sat 5/2
10:52 am-12:22 pm
Nonstop1h 30m
Ontario
Sat 5/2
6:59 pm-8:28 pm
Nonstop1h 29m
$247
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Sat 4/25
10:50 am-12:20 pm
Nonstop1h 30m
Ontario
Mon 4/27
6:00 am-7:29 am
Nonstop1h 29m
$285
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Wed 4/22
8:55 am-3:05 pm
2 stops6h 10m
Ontario
Mon 4/27
3:00 pm-10:10 pm
2 stops7h 10m
$295
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Thu 7/23
5:00 am-11:20 am
2 stops6h 20m
Ontario
Mon 7/27
5:15 am-12:00 pm
1 stop6h 45m
$304
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Sat 4/18
4:10 pm-5:47 pm
Nonstop1h 37m
Ontario
Sun 4/26
11:05 am-12:35 pm
Nonstop1h 30m
$317
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Fri 6/12
6:45 pm-12:05 am
1 stop5h 20m
Ontario
Sun 6/14
2:35 pm-12:10 am
1 stop9h 35m
$343
Cheapest one-way
San FranciscoOntario
SFO - ONT
SFOONT
San Francisco
Thu 4/23
9:09 pm-10:45 pm
Nonstop1h 36m
$89
Showing 1-10 of 21 resultsSorted by cheapest first
Best time to book a flight from Fremont to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Fremont with our price prediction graph.
SFO-ONT
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 Fremont to Ontario
FR8-ONT
SFO-ONT
How far ahead should I book a flight from Fremont to Ontario?
Use this chart to determine the optimal time to book a round-trip flight from Fremont to Ontario. Price data was last updated on March 13, 2026.
The price you pay for your flight from Fremont to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 35 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 Fremont to Ontario?
Currently, February is the cheapest month in which you can book a flight from Fremont to Ontario (average of $33). Flying from Fremont to Ontario in September is currently the most expensive (average of $60). 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 FR8 to ONT?
Find hourly flight availability from Fremont to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 30, 2026.
One of the essential ways to save on airfare from Fremont to Ontario is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 29% on airfare.
What is the cheapest day to fly from Fremont to Ontario?
Use this chart to determine the cheapest time to fly round-trip from Fremont to Ontario. Price data was last updated on March 28, 2026.
Travelers seeking maximum savings on their Fremont to Ontario flight should consider departing on Monday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost to fly round-trip from Fremont to Ontario?
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 30, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Fremont to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Related info for your journey
Find useful and relevant information for your journey from Fremont to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Popular flights
Top destinations
Alternative routes for Fremont to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Fremont to Ontario by cabin class
Find flights from Fremont to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 30, 2026.
Fremont and Ontario flights
Browse other Fremont and Ontario flight options. Last updated on March 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fremont to Ontario flights
Consider these flights traveling from Fremont to Ontario.
Top 6 airlines flying from Fremont to Ontario
Discover the top 6 airlines that operate flights from Fremont to Ontario. 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 March 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$27 | Average$150 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$66 | Average$204 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$68 | Average$220 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$107 | Average$265 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$115 | Average$268 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$186 | Average$221 | FlexibilityNo cancel fee | On-time71% |