Southwest Airlines Flights from Dallas to Ontario

Southwest Airlines on this route

Dallas is a Southwest Airlines hub, so Southwest Airlines typically offers several daily departures on DFW–ONT, with nonstop service where demand supports it and connections through its other hubs otherwise. The nonstop flight time is about 3h 3m.

Fare classes available: Basic, Choice / Choice Preferred, Choice Extra. Southwest does not charge change fees on any fare; you pay the fare difference if the new flight is more expensive.

The lowest one-way fare we have on record for this route is $121. Fares like that usually show up on off-peak days and for travel booked a few weeks out; an agent can check whether a similar fare is available for your dates.

Because Delta Air Lines treats Ontario as a hub, this pairing tends to have frequent departures throughout the day. American Airlines and Southwest Airlines also compete here, which keeps fares in check.

The 1,186 miles between Dallas and Ontario works out to about 3h 3m in the air, the range where nonstops are common on busy days and connections through a hub fill in the rest. Ask the agent to compare both; the one-stop is sometimes cheaper by a wide margin.

When to fly

Southern departures see their highest fares over spring break and the winter holidays; late summer and the weeks after Labor Day typically bring the lowest prices.

On this specific route our fare history shows October as the cheapest month and November as the most expensive, a spread of $141 between the two.

Tuesday, Wednesday, and Saturday departures are usually the cheapest days on domestic routes; Friday and Sunday are the most expensive. Early-morning and late-evening flights are often priced below the midday departures.

For domestic travel, booking three to eight weeks ahead usually captures the best price. Inside two weeks, fares climb; more than four months out, airlines have not yet released their cheapest inventory.