The cheapest times to fly from OAK to ONT are

  • April 23rd to May 13th (except the week of April 30th)
  • July 2nd to July 15th
  • September 17th to November 18th
  • December 3rd to March 4th (except the week of December 17th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from OAK to ONT is late January. Prices can be as high as $1090 for Sunday flights during late July, or as low as $174 for Tuesday flights around late January.


When to Fly to Ontario

Flying from Oakland, CA (OAK) to Ontario, CA (ONT) will usually cost between $181 to $487 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $200. Due to high demand the most expensive time to fly is late July, with an average price of $506. Planning your trip to low-cost times can easily save you $306 on economy flights and even more on first-class flights. Generally, any price below $301 can be considered a good price for a round-trip OAK to ONT flight.

See below for a graph of average weekly prices for the OAK to ONT route. All prices are for round-trip tickets in USD.

OAK to ONT Flight Prices

Compared to other flights, the OAK to ONT flight is much cheaper than the average and costs much less than the average flight leaving from Oakland. The average price per mile (for a direct flight) is $0.52, which is above average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $147 (36%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $248. Return trip prices are from the ONT to OAK flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from OAK to ONT can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 1 hour 38 minutes may be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from OAK to ONT while comparing.

Destination alternative #1: Los Angeles International Airport (LAX) in Los Angeles, CA

  • 47 miles (76 km) away from ONT
  • Usually 34.22% less expensive than ONT
  • Nonstop flights available

See OAK to LAX flights

Destination alternative #2: Long Beach Airport (LGB) in Long Beach, CA

  • 36 miles (58 km) away from ONT
  • Usually 29.24% less expensive than ONT
  • Nonstop flights available

See OAK to LGB flights

Destination alternative #3: San Diego International Airport (SAN) in San Diego, CA

  • 94 miles (151 km) away from ONT
  • Usually 24.58% less expensive than ONT
  • Nonstop flights available

See OAK to SAN flights

Destination alternative #4: Bob Hope Airport (BUR) in Burbank, CA

  • 44 miles (71 km) away from ONT
  • Usually 15.28% less expensive than ONT
  • Nonstop flights available

See OAK to BUR flights

Destination alternative #5: John Wayne-Orange County Airport (SNA) in Santa Ana, CA

  • 30 miles (48 km) away from ONT
  • Usually 4.98% less expensive than ONT
  • Nonstop flights available

See OAK to SNA flights

Destination alternative #6: Palm Springs International Airport (PSP) in Palm Springs, CA

  • 65 miles (105 km) away from ONT
  • Usually 3.16% less expensive than ONT
  • 1-layover flights available

See OAK to PSP flights


Flight Questions Answered

Still have questions about flying from OAK to ONT? We’ve got answers.

Which airlines fly this route?

You can find 5 major airlines flying this route most often: Alaska, American, Delta, Southwest, United, and potentially more during busy seasons.

How far away is it from Ontario International Airport to Metropolitan Oakland International Airport?

The distance between the two airports is roughly 362 miles or 583 kilometers.

How long does it take to fly from OAK to ONT?

The real-world flight time for a nonstop OAK to ONT flight is about 1 hour 38 minutes.

How many flights go between Oakland, CA and Ontario, CA?

It depends on the day of the week and the date, but a typical day might have around 62 available flights from OAK to ONT.


Airport Location Info


Departing Airport

Origination code OAK
Origination airport name Metropolitan Oakland International Airport
City Oakland, CA
Country the United States
Latitude 37.7
Longitude -122.2

Return Airport

Destination code ONT
Destination airport name Ontario International Airport
City Ontario, CA
Country the United States
Latitude 34.1
Longitude -117.6


Late and Early Flight Data

Flights from OAK to ONT tend to depart as late as the average flight. According to our recently updated data, 29% of flights departed 5 or more minutes late, and 11% of flights left 5 or more minutes early. On average you can expect to leave ONT heading for OAK about 8 minutes late. This does significantly impact arrival time, as the average landing time in Ontario, CA is about 1 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:

  • Southwest: 8 minutes late
  • Some airlines not reporting


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.