$258RT
$85 Price Drop
The price for this trip is $85 lower than it was this time last week. Grab it while it lasts!
Washington, D.C., DC (WAS) to Ontario, CA (ONT)
TRAVEL DATES Best Times To Go
TRAVEL DATES Wed, Mar 25 - Mon, Mar 30
TRAVEL DATES Wed, Mar 25 - Mon, Mar 30
TRAVEL DATES Wed, Apr 22 - Wed, Apr 29
Search This Deal Now
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Find This Fare Now
TRAVEL DATES Best Times To Go
TRAVEL DATES Wed, Mar 25 - Mon, Mar 30
TRAVEL DATES Wed, Mar 25 - Mon, Mar 30
TRAVEL DATES Wed, Apr 22 - Wed, Apr 29
Airlines
Frontier
Trip’s Length
5 Days
What You Need To Know
  • Available for midweek travel
  • All mandatory taxes/fees are included in the price. Read More >
  • Baggage fees, if applicable, and other optional fees are not included.
  • Tax-inclusive fare may be a few dollars higher or lower depending on the airport you connect through, if any.

Expert verified flight deals from WAS to ONT. The largest selection of handpicked flight deals across all airlines from Washington, D.C., DC - All Airports to Ontario, CA - Ontario International Airport.

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