The cheapest times to fly from SWO to ONT are

  • January 1st to February 25th
  • May 28th to June 10th
  • July 2nd to July 15th
  • August 6th to October 7th

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 SWO to ONT is early to mid September. Prices can be as high as $807 for Sunday flights during early to mid March, or as low as $260 for Tuesday flights around early to mid September.


When to Fly to Ontario

Flying from Stillwater, OK (SWO) to Ontario, CA (ONT) will usually cost between $260 to $577 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid September with an average ticket price of $263. Due to high demand the most expensive time to fly is early to mid March, with an average price of $549. Planning your trip to low-cost times can easily save you $286 on economy flights and even more on first-class flights. Generally, any price below $327 can be considered a good price for a round-trip SWO to ONT flight.

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

SWO to ONT Flight Prices

Compared to other flights, the SWO to ONT flight is much cheaper than the average and costs much less than the average flight leaving from Stillwater. The average price per mile (for a direct flight) is $0.17, which is below 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 $152 (34%) 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 $299. Return trip prices are from the ONT to SWO 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 SWO to ONT can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 3 hour 5 minutes may not 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 not usually a nonstop flight from SWO to ONT while comparing.

Destination alternative #1: John Wayne-Orange County Airport (SNA) in Santa Ana, CA

  • 30 miles (48 km) away from ONT
  • Usually 8.26% less expensive than ONT
  • 1-layover flights available

See SWO to SNA flights

Destination alternative #2: Los Angeles International Airport (LAX) in Los Angeles, CA

  • 47 miles (76 km) away from ONT
  • Usually 5.50% less expensive than ONT
  • 1-layover flights available

See SWO to LAX flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 2 major airlines flying this route most often: American, United, and potentially more during busy seasons.

How far away is it from Ontario International Airport to Stillwater Regional Airport?

The distance between the two airports is roughly 1166 miles or 1876 kilometers.

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

The real-world flight time for a nonstop SWO to ONT flight is about 3 hour 5 minutes.

How many flights go between Stillwater, OK and Ontario, CA?

It depends on the day of the week and the date, but a typical day might have around 20 available flights from SWO to ONT.


Airport Location Info


Departing Airport

Origination code SWO
Origination airport name Stillwater Regional Airport
City Stillwater, OK
Country the United States
Latitude 36.2
Longitude -97.1

Return Airport

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


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.