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Cheap flight tickets from Oakland Metropolitan Oak to Ontario International

Compare Oakland Metropolitan Oak to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Oakland Metropolitan Oak to Ontario International

Looking for a cheap last-minute deal or the best return flight from Oakland Metropolitan Oak to Ontario International? Find the lowest prices on one-way and return tickets right here.
Ontario.RM329 per passenger.Departing Tue, 1 Jul, returning Tue, 1 Jul.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Oakland Metropolitan Oak on Tue, 1 Jul, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Tue, 1 Jul, arriving in Oakland Metropolitan Oak.Price includes taxes and charges.From RM329, select.
Ontario.RM331 per passenger.Departing Wed, 11 Jun, returning Wed, 11 Jun.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Oakland Metropolitan Oak on Wed, 11 Jun, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Wed, 11 Jun, arriving in Oakland Metropolitan Oak.Price includes taxes and charges.From RM331, select.
Ontario.RM491 per passenger.Departing Tue, 22 Jul, returning Thu, 14 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Oakland Metropolitan Oak on Tue, 22 Jul, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Thu, 14 Aug, arriving in Oakland Metropolitan Oak.Price includes taxes and charges.From RM491, select.
Ontario.RM495 per passenger.Departing Tue, 16 Sep, returning Thu, 18 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Oakland Metropolitan Oak on Tue, 16 Sep, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Thu, 18 Sep, arriving in Oakland Metropolitan Oak.Price includes taxes and charges.From RM495, select.
Ontario.RM495 per passenger.Departing Wed, 13 Aug, returning Mon, 18 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Oakland Metropolitan Oak on Wed, 13 Aug, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Mon, 18 Aug, arriving in Oakland Metropolitan Oak.Price includes taxes and charges.From RM495, select.
Ontario.RM917 per passenger.Departing Thu, 13 Nov, returning Sun, 16 Nov.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Oakland Metropolitan Oak on Thu, 13 Nov, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sun, 16 Nov, arriving in Oakland Metropolitan Oak.Price includes taxes and charges.From RM917, select.
Ontario.RM923 per passenger.Departing Thu, 23 Oct, returning Mon, 27 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Oakland Metropolitan Oak on Thu, 23 Oct, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 27 Oct, arriving in Oakland Metropolitan Oak.Price includes taxes and charges.From RM923, select.
Ontario.RM1,111 per passenger.Departing Thu, 4 Dec, returning Mon, 15 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Oakland Metropolitan Oak on Thu, 4 Dec, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 15 Dec, arriving in Oakland Metropolitan Oak.Price includes taxes and charges.From RM1,111, select.

Find the cheapest month to fly from Oakland Metropolitan Oak to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Oakland Metropolitan Oak to Ontario International flights are currently cheapest in July.
May
from RM1,123
Jun
from RM331
Jul
from RM329
Aug
from RM495
Sep
from RM495
Oct
from RM923
Nov
from RM917
Dec
from RM1,111
Jan
Find prices
Feb
Find prices
Mar
Find prices
Apr
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Direct flights from Oakland Metropolitan Oak to Ontario International

Oakland Metropolitan Oak to Ontario International: Alternative routes

Compare routes from Oakland Metropolitan Oak to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Oakland to Ontario: Flight information

The things to know before you go.
Cheapest flight foundRM329
Cheapest month to flyJuly
Average flight time1 hr, 22 mins
Most popular airlineSouthwest Airlines
Average flights per week26

Finding cheap flights from Oakland Metropolitan Oak to Ontario International: Frequently asked questions

The best price we found for a return flight from Oakland Metropolitan Oak to Ontario International is RM329. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 22 minutes is the average flight time from Oakland Metropolitan Oak to Ontario International.
Southwest Airlines flies direct from Oakland Metropolitan Oak to Ontario International.
As of May 2025, there are 26 flights per week flying from Oakland Metropolitan Oak to Ontario International.
The cheapest month to fly from Oakland Metropolitan Oak to Ontario International is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Oakland Metropolitan Oak Airport to Ontario International Airport on Tuesday, 1 July 2025.
Yes – the average flight time is 1 hour and 22 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Southwest Airlines offers the cheapest flight tickets to Ontario International.

Flying from Metropolitan Oakland International Airport (OAK) to Ontario International Airport (ONT): what you need to know

  • The average length of a direct flight from Metropolitan Oakland International Airport to Ontario International Airport is 1 hour 20 minutes.

  • Ontario's timezone is UTC-7, which is the same as Oakland.

  • Flights from OAK to ONT start at 05:30 — the earliest with Southwest Airlines. The last departure is at 21:50 with Southwest Airlines. In total, you can take your pick of 22 weekly Metropolitan Oakland International Airport to Ontario International Airport flights.

  • Your OAK to ONT flight won't wait if you're late, so don't forget to check in on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're flying internationally.

  • Flying during a peak month like July? School holidays and other high seasons can result in longer lines at check-in and security. Be extra cautious and get there up to four hours before an international flight and two hours before domestic departures.

  • Southwest Airlines has direct flights from Metropolitan Oakland International Airport to Ontario International Airport. Book with this popular airline, then get ready to see the sights in Ontario — and maybe even more of United States if time allows.

  • Southwest Airlines is the top choice for travellers on this route.

  • Southwest Airlines is the most punctual carrier that offers OAK to ONT flights. An exceptional 85.43% of its departures on this route arrive as scheduled.

  • If you'd like to add a stop to your trip, just uncheck 'Direct flights only' when searching for your ticket from Metropolitan Oakland International Airport to Ontario International Airport. These are the top stopovers between OAK and ONT:

    • Harry Reid Airport (formerly McCarran Airport)

    • Salt Lake City International Airport

    • Phoenix Sky Harbour International Airport

How to find the cheapest flights from Metropolitan Oakland International Airport (OAK) to Ontario International Airport (ONT)

  • RM164 is currently the best price for a one-way Metropolitan Oakland International Airport to Ontario International Airport flight. A return flight starts at RM329. These prices can change depending on demand and availability.

  • Score cheap tickets from OAK to ONT by booking at least six months ahead. According to our research, that's the sweet spot for landing a bargain.

  • Schedule your trip for May. That's the cheapest month for flights from Metropolitan Oakland International Airport to Ontario International Airport. If your travel dates are flexible, use the 'Whole month' tool to find the cheapest price across each month.

  • You don't need to check every day to see if fares have dropped when you set up a Price Alert. We'll notify you as soon as there's a better deal on cheap flights from OAK to ONT.

  • Tailor your flights with filters. Pick your preferred departure and arrival times, airlines and total journey duration. You can also sort the results by 'Cheapest,' 'Fastest' or 'Best' flights from Metropolitan Oakland International Airport to Ontario International Airport.

Handy information about Metropolitan Oakland International Airport (OAK)

  • You'll find OAK at 1 Airport Drive.

  • Metropolitan Oakland International Airport scores high marks for its on-time performance. 83.61% of flights that depart OAK arrive at their destination as scheduled.

  • To get to Metropolitan Oakland International Airport from central Oakland, it takes about 15 minutes by car. This depends on traffic, however. It's approximately 16 kilometres from the airport to the city centre.

  • Expect a trip time of roughly 40 minutes on public transport.

  • Get your trip off to a stress-free start by staying near OAK. Whether you have an early flight from Metropolitan Oakland International Airport to Ontario International Airport or just don't want to be rushed, these hotels are ideal:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • ONT is located at 2900 E. Airport Drive.

  • Ontario International Airport to the centre of Ontario has a drive time of around 10 minutes. It's approximately 6 kilometres away.

  • Getting to the centre on public transport typically takes 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • It's time to work out your dates for your flight from Metropolitan Oakland International Airport to Ontario International Airport. August is the most popular month to visit Ontario. If you'd like a more laid-back vibe, go in May.

  • Book your flight from Metropolitan Oakland International Airport to Ontario International Airport for August if you'd like to explore Ontario during its warmest month. Expect temperatures of between 15ºC (59ºF) and 35ºC (95ºF).

  • January has average temperatures of between 4ºC (39ºF) and 23ºC (73ºF). Look for cheap tickets from OAK to ONT sometime around then if you want to travel in cooler conditions.

Explore more of United States

  • You've visited Ontario, now it's time to explore more of United States. Journey about 56 kilometres west to Los Angeles to tick off its top sights. From Griffith Observatory to The Broad and La Brea Tar Pits & Museum, you'll have a packed itinerary ahead.

  • Around 153 kilometres south of Ontario, San Diego is another favourite stop in United States. No visit is complete without checking out San Diego Zoo, USS Midway Museum and SeaWorld San Diego.

Plan the rest of your trip from Oakland to Ontario

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.