$21+ Cheap flights from Ontario to Oakland, CA (ONT - OAK)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OAK
Dec 3 — Dec 101
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Oakland 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 Oakland are usually found in September or December, booked 70 days in advance, depart on a Saturday or Thursday and return on a Thursday
Cheap flight deals from Ontario to Oakland
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to OaklandExplore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2026.
Explore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2026.
This CheapOair deal was found by Cheapflights users on 10/30. 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.
Sat 11/211:37 pm -
Nonstop1h 20m
Thu 11/268:35 pm -
Nonstop1h 17m
Deal found 10/30![Frontier logo]()
$45
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/211:37 pm -
Nonstop1h 20m
Sun 11/228:35 pm -
Nonstop1h 17m
Deal found 10/29![Frontier logo]()
$78
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:24 pm -
Nonstop1h 20m
Mon 11/3011:24 am -
1 stop25h 15m
Deal found 10/29![Frontier logo]()
$88
This WAYA deal was found by Cheapflights users on 10/30. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/261:43 pm -
Nonstop1h 20m
Thu 12/312:28 pm -
1 stop5h 43m
Deal found 10/30![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Tue 12/12:00 pm -
1 stop21h 33m
Wed 12/912:28 pm -
1 stop6h 03m
Deal found 10/28![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 11/1. 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.
Tue 12/12:00 pm -
1 stop21h 33m
Tue 12/812:28 pm -
1 stop6h 03m
Deal found 11/1![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 11/302:01 pm -
1 stop21h 32m
Wed 12/212:28 pm -
1 stop5h 43m
Deal found 10/30![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/22:00 pm -
1 stop21h 33m
Tue 12/812:28 pm -
1 stop6h 03m
Deal found 11/1![Frontier logo]()
$100
This CheapOair deal was found by Cheapflights users on 11/1. 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.
Sun 11/224:13 pm -
1 stop18h 16m
Tue 11/248:35 pm -
Nonstop1h 17m
Deal found 11/1![Frontier logo]()
$101
This Frontier deal was found by Cheapflights users on 10/31. 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 11/211:37 pm -
Nonstop1h 20m
Mon 11/2311:24 am -
1 stop8h 12m
Deal found 10/31![Frontier logo]()
$103
Best flights from Ontario to OaklandDiscover carefully curated flight deals from Ontario to Oakland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 3, 2026.
Discover carefully curated flight deals from Ontario to Oakland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 3, 2026.
This Southwest deal was found by Cheapflights users on 11/2. 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 12/36:55 pm -
Nonstop1h 30m
Mon 12/73:00 pm -
Nonstop1h 15m
Deal found 11/2![Southwest logo]()
$137
This Southwest deal was found by Cheapflights users on 10/29. 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.
Sun 12/61:35 pm -
Nonstop1h 25m
Mon 12/711:30 am -
Nonstop1h 20m
Deal found 10/29![Southwest logo]()
$164
This Southwest deal was found by Cheapflights users on 10/30. 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 11/2011:25 am -
Nonstop1h 20m
Mon 11/238:20 pm -
Nonstop1h 25m
Deal found 10/30![Southwest logo]()
$194
This Southwest deal was found by Cheapflights users on 10/30. 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 12/118:45 pm -
1 stop3h 25m
Sat 12/129:50 am -
2 stops5h 30m
Deal found 10/30![Southwest logo]()
$219
This Southwest deal was found by Cheapflights users on 10/29. 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 1/142:00 pm -
Nonstop1h 20m
Sun 1/173:45 pm -
Nonstop1h 20m
Deal found 10/29![Southwest logo]()
$236
This Southwest deal was found by Cheapflights users on 10/31. 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 11/286:10 am -
Nonstop1h 25m
Sat 12/56:20 am -
Nonstop1h 20m
Deal found 10/31![Southwest logo]()
$288
This Southwest deal was found by Cheapflights users on 11/1. 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 11/275:45 am -
Nonstop1h 25m
Sun 11/297:05 am -
Nonstop1h 20m
Deal found 11/1![Southwest logo]()
$288
This Southwest deal was found by Cheapflights users on 10/29. 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 12/316:55 pm -
Nonstop1h 30m
Sun 1/36:00 am -
Nonstop1h 25m
Deal found 10/29![Southwest logo]()
$298
This Southwest deal was found by Cheapflights users on 10/31. 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 11/143:40 pm -
Nonstop1h 25m
Sat 11/215:50 am -
Nonstop1h 20m
Deal found 10/31![Southwest logo]()
$298
This Southwest deal was found by Cheapflights users on 10/29. 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.
Fri 1/16:35 am -
Nonstop1h 20m
Sun 1/36:00 am -
Nonstop1h 25m
Deal found 10/29![Southwest logo]()
$298
Last-minute flights from Ontario to OaklandDiscover last-minute flight deals from Ontario to Oakland. Data last updated November 3, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Oakland. Data last updated November 3, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 10/30. 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.
Sat 11/211:37 pm -
Nonstop1h 20m
Thu 11/268:35 pm -
Nonstop1h 17m
Deal found 10/30![Frontier logo]()
$45
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/211:37 pm -
Nonstop1h 20m
Sun 11/228:35 pm -
Nonstop1h 17m
Deal found 10/29![Frontier logo]()
$78
This Frontier deal was found by Cheapflights users on 10/31. 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 11/211:37 pm -
Nonstop1h 20m
Mon 11/2311:24 am -
1 stop8h 12m
Deal found 10/31![Frontier logo]()
$103
This CheapOair deal was found by Cheapflights users on 11/1. 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.
Sun 11/224:13 pm -
1 stop18h 16m
Tue 11/248:35 pm -
Nonstop1h 17m
Deal found 11/1![Frontier logo]()
$101
This CheapOair deal was found by Cheapflights users on 10/30. 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 11/242:01 pm -
1 stop5h 49m
Tue 12/112:28 pm -
1 stop5h 43m
Deal found 10/30![Frontier logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:24 pm -
Nonstop1h 20m
Sun 11/2911:24 am -
1 stop19h 56m
Deal found 10/29![Frontier logo]()
$117
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/261:43 pm -
Nonstop1h 20m
Mon 11/3011:24 am -
1 stop25h 15m
Deal found 10/29![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 11/302:01 pm -
1 stop21h 32m
Wed 12/212:28 pm -
1 stop5h 43m
Deal found 10/30![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 11/3010:55 am -
1 stop24h 38m
Mon 12/712:28 pm -
1 stop23h 23m
Deal found 11/2![Frontier logo]()
$118
One-way flights from Ontario to OaklandSearch for one-way flight options from Ontario to Oakland. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.
Search for one-way flight options from Ontario to Oakland. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.
This CheapOair deal was found by Cheapflights users on 10/30. 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.
Sat 11/211:37 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$21
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/261:43 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$24
This Frontier deal was found by Cheapflights users on 11/2. 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 11/2412:24 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$33
This Trip.com deal was found by Cheapflights users on 11/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/12:00 pm -
1 stop21h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$46
This WAYA deal was found by Cheapflights users on 10/30. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/59:00 am -
1 stop11h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$48
This Trip.com deal was found by Cheapflights users on 11/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/178:02 am -
1 stop14h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$50
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1111:00 am -
1 stop24h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$52
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2212:24 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$54
Find flight deals from Ontario to Oakland
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Oakland (OAK). 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 November 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $45 (CheapOair) |
One-way from | $21 (CheapOair) |
Popular in | July |
Cheapest in | September |
Average price | $318 |
Good round-trip deal | $227 or less |
Good one-way deal | $150 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Oakland 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 7,457,451 searches. Data last updated November 3, 2026.
Use the filters below to find and compare flights from Ontario to Oakland that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Fri 1/15
10:15 am-11:35 am
Nonstop1h 20m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$69
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Sat 12/5
1:25 pm-9:15 pm
1 stop7h 50m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Thu 1/21
7:40 am-2:20 pm
1 stop6h 40m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Thu 12/3
6:55 pm-8:25 pm
Nonstop1h 30m
Oakland
Mon 12/7
3:00 pm-4:15 pm
Nonstop1h 15m
$137
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Wed 11/25
11:55 am-1:15 pm
Nonstop1h 20m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$153
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Sun 12/6
1:35 pm-3:00 pm
Nonstop1h 25m
Oakland
Mon 12/7
11:30 am-12:50 pm
Nonstop1h 20m
$164
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Thu 11/26
6:25 am-12:35 pm
2 stops6h 10m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$168
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Tue 1/5
7:00 am-4:17 pm
2 stops9h 17m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$187
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Fri 11/20
11:25 am-12:45 pm
Nonstop1h 20m
Oakland
Mon 11/23
8:20 pm-9:45 pm
Nonstop1h 25m
$194
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Mon 4/19
11:50 am-4:35 pm
1 stop4h 45m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$200
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Ontario to Oakland
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Oakland in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Oakland, California flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Oakland, California flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Oakland, California flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Oakland, California flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Oakland, California flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Oakland
Have a flexible travel schedule? Discover the best time to fly to Oakland from Ontario with our price prediction graph.
ONT-OAK
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 Oakland
How far ahead should I book a flight from Ontario to Oakland, California?
The price you pay for your flight from Ontario to Oakland, California may vary depending on when you book. For the best chance of a lower fare, look to book 68 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 Ontario to Oakland, California?
Currently, September is the cheapest month in which you can book a flight from Ontario to Oakland, California (average of $248). Flying from Ontario to Oakland, California in July is currently the most expensive (average of $349). 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 ONT to OAK?
Find hourly flight availability from Ontario to Oakland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 3, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 21% on flights from Ontario to Oakland, California by exploring options for tickets at noon.
The best insider tips for Ontario to Oakland flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Ontario to Oakland trip
Our travel experts
Reviews of airlines servicing Oakland
Get insights into the airlines that provide service to Oakland. 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 Oakland. Reviews last updated November 3, 2026.
Peruse reviews from past customers who have flown with Southwest and Frontier from Ontario to Oakland 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.
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Boarding
8.1
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 Oakland. 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.
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Alternative routes for Ontario to Oakland
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Oakland by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Oakland by cabin class
Find flights from Ontario to Oakland, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Oakland
Explore flights to Oakland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 3, 2026.
Ontario and Oakland flights
Browse other Ontario and Oakland flight options. Last updated on November 3, 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 November 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Ontario to Oakland
Discover the top 2 airlines that operate flights from Ontario to Oakland. 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 7,457,451 searches. Data last updated November 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$46 | Average$185 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$198 | Average$312 | FlexibilityNo cancel fee | On-time63% |