Flight tickets from Ontario International (ONT) to Washington Ronald Reagan (DCA)

Compare Ontario International to Washington Ronald Reagan flight deals

Find the cheapest month or even day of the year to fly to Washington Ronald Reagan

Book the best Washington Ronald Reagan fare with no extra fees

Flight deals from Ontario International to Washington Ronald Reagan

Looking for a cheap last-minute deal or the best return flight from Ontario International to Washington Ronald Reagan? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Ontario International to Washington Ronald Reagan

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Washington Ronald Reagan flights are currently cheapest in May.

Ontario to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found₹ 9,536
Cheapest month to flyMay

Finding cheap flights from Ontario International to Washington Ronald Reagan: Frequently asked questions

The best price we found for a return flight from Ontario International to Washington Ronald Reagan is ₹ 17,948. 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.
Currently, there are no airlines that fly direct from Ontario International to Washington Ronald Reagan. But we found flights with one or more stops from ₹ 17,948.
As of February 2026, there are no flights flying from Ontario International to Washington Ronald Reagan.
The cheapest month to fly from Ontario International to Washington Ronald Reagan is usually March.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Washington Ronald Reagan Airport on Tuesday, 3 March 2026.
No airlines currently offer direct flights between Ontario International Airport and Washington Ronald Reagan Airport. Most routes have one or more stops.
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 Washington Ronald Reagan 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 Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Washington Ronald Reagan.

Travelling from Ontario International Airport (ONT) to Ronald Reagan National Airport (DCA): what you need to know

  • Washington DC is three hours ahead of Ontario and follows the UTC-4 timezone.

  • To ensure you get on your ONT to DCA flight, leave plenty of time for things like baggage drop and finding your gate. Turning up two hours ahead of international departures and one hour before domestic flights is the general travel rule.

  • Be prepared for longer queues during popular months like August. Arriving up to four hours ahead of international flights and two hours for a domestic departure is a smart move.

  • Think about adding a stopover when booking your ticket from Ontario International Airport to Ronald Reagan National Airport. Simply uncheck 'Direct flights only' to break up your journey, or visit a new city along the way. Here are some options between ONT and DCA:

    • Nashville International Airport

    • Austin-Bergstrom International Airport

    • Harry Reid Airport (formerly McCarran Airport)

How to find the cheapest flights from Ontario International Airport (ONT) to Ronald Reagan National Airport (DCA)

  • ₹ 9,536 is currently the best price for a one-way Ontario International Airport to Ronald Reagan National Airport flight. A return flight starts from ₹ 17,948. These fares can change based on availability and demand.

  • It's often best to book early if you want to get cheap tickets from ONT to DCA. That's because airlines change prices based on demand, which tends to increase closer to departure.

  • The 'Whole month' search tool shows you the cheapest flights from Ontario International Airport to Ronald Reagan National Airport across each month. It's a good way to find a bargain if your travel dates aren't set in stone.

  • Getting your hands on cheap flights from ONT to DCA couldn't be easier with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you as soon as a lower fare pops up.

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

Handy information about Ontario International Airport (ONT)

  • ONT's address is 2900 E. Airport Drive.

  • 83.6% of flights departing from Ontario International Airport arrive at their destination on schedule. Given its strong performance rating, delays are unlikely when taking off from ONT.

  • Ontario International Airport is about 6 kilometres from central Ontario. If you're catching a cab, ride-sharing or driving from the centre, it'll take 10 minutes or so to get there, depending on the traffic.

  • Expect a journey time of around 1 hour 30 minutes on public transport.

  • Taking an early flight from Ontario International Airport to Ronald Reagan National Airport? Avoid rushing to the terminal (and enjoy a little extra shut-eye) by picking one of these stays near ONT:

Arriving at Ronald Reagan National Airport (DCA)

Getting from Ronald Reagan National Airport (DCA) to central Washington DC

  • DCA is located at 1 Aviation Circle.

  • From Ronald Reagan National Airport, Washington DC is approximately 8 kilometres away. It takes around 15 minutes to reach the centre by car.

  • If you're travelling by public transport, expect a journey of about 45 minutes.

When to fly to Ronald Reagan National Airport (DCA)

  • It's time to work out your dates for your flight from Ontario International Airport to Ronald Reagan National Airport. February is the most popular month to head to Washington DC. If you want a more relaxed vibe, go in May.

  • Before locking in your flight from Ontario International Airport to Ronald Reagan National Airport, think about the kind of weather you enjoy. July is the warmest month in Washington DC, with temperatures ranging from 19ºC to 33ºC.

  • Look for cheap tickets from ONT to DCA in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -6ºC and 10ºC on average.

Explore more of United States

  • New York is just one of the many cities in United States waiting to be explored after you've seen Washington DC. Around 322 kilometres away to the north-east, top sights here include Statue of Liberty, Central Park and Empire State Building.

  • Philadelphia is another essential stop in United States and is around 193 kilometres north-east of Washington DC. No journey is complete without seeing Liberty Bell, Independence Hall and Philadelphia Museum of Art.

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