Cheap flights from Ontario to Washington, D.C. from $85
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Washington, D.C. departing on 11/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Not ready to book? to track prices.Frontier flights from Ontario to Washington, D.C. Reagan-National Airport
Our best Frontier deals on Ontario to Washington, D.C. Reagan-National Airport flight tickets
Southwest flights from Ontario to Washington, D.C. Reagan-National Airport
Our best Southwest deals on Ontario to Washington, D.C. Reagan-National Airport flight tickets
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Use the filters below to find and compare flights from Ontario to Washington, D.C. Reagan-National Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Sat 11/7
11:52 am-9:50 pm
1 stop6h 58m
Washington, D.C. Reagan-National
Tue 11/10
7:00 am-11:51 pm
1 stop19h 51m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Wed 11/11
11:52 am-9:50 pm
1 stop6h 58m
Washington, D.C. Reagan-National
Wed 11/18
7:00 am-11:51 pm
1 stop19h 51m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Thu 10/29
5:20 am-5:20 pm
2 stops9h 00m
Washington, D.C. Reagan-National
Sat 11/14
2:35 pm-6:50 pm
1 stop7h 15m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Tue 11/3
1:35 pm-11:50 pm
1 stop7h 15m
Washington, D.C. Reagan-National
Fri 11/6
6:10 am-1:05 pm
1 stop9h 55m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Mon 2/1
12:00 pm-10:15 pm
1 stop7h 15m
Washington, D.C. Reagan-National
Fri 2/5
5:00 pm-11:48 pm
1 stop9h 48m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Fri 11/6
12:16 pm-11:47 pm
1 stop8h 31m
Washington, D.C. Reagan-National
Wed 11/11
5:59 pm-11:49 pm
1 stop8h 50m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Thu 12/17
9:35 am-8:58 pm
1 stop8h 23m
Washington, D.C. Reagan-National
Sat 1/16
1:45 pm-6:51 pm
1 stop8h 06m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Fri 10/30
5:30 pm-4:00 pm
1 stop19h 30m
Washington, D.C. Reagan-National
Thu 11/5
1:00 pm-11:51 pm
1 stop13h 51m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Thu 1/28
12:45 pm-11:59 pm
1 stop8h 14m
Washington, D.C. Reagan-National
Tue 2/2
5:02 pm-11:16 pm
1 stop9h 14m
OntarioWashington, D.C.
ONT Ontario - DCA Washington, D.C. Reagan-National
ONTDCA
Ontario
Fri 11/6
4:04 pm-4:20 pm
2 stops21h 16m
Washington, D.C. Reagan-National
Mon 11/9
6:00 pm-11:51 pm
1 stop8h 51m
See travel insights to Washington, D.C. from
How to get the cheapest flight ticket from Ontario to Washington, D.C. Reagan-National Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Ontario and Washington, D.C. Reagan-National Airport?
Prices are currently low for flights on this route.
Typical prices usually range from $277 to $556.The lowest price recently found on this route was $261.
What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?
The month of January is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Ontario, with most prices found around $265. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $320.
What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?
The cheapest day to depart from Ontario to Washington, D.C. Reagan-National Airport is on a Wednesday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Wednesday will often find tickets for as low as $480. Flights from Ontario to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $674. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?
Our data shows that the cheapest Ontario to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the afternoon. Our users have found flights to Washington, D.C. Reagan-National Airport in the afternoon for as low as $432. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is in the morning when prices are around $535.
How far in advance should I book a flight from Ontario to Washington, D.C. Reagan-National Airport?
You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $432 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from Ontario for as low as $289 on momondo.
What is the cheapest airline that flies from Ontario to Washington, D.C. Reagan-National?
Frontier, Delta, and Southwest are the most popular carriers operating from Ontario to Washington, D.C. Reagan-National
What airlines fly to Washington, D.C. Reagan-National Airport?
American Airlines, Southwest and Alaska Airlines are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from Ontario according to our data. American Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 7 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.
Which airport is the most popular layover for flights between Ontario and Washington, D.C. Reagan-National Airport?
Denver (DEN) was the most common stop: 57% of momondo users choosing 1-stop flights on this route connected there.
Which layover airport offers the lowest fares from Ontario to Washington, D.C. Reagan-National Airport?
Flights via Denver (DEN) offer the lowest average round-trip price of $264.
Which layover airport has the shortest travel time from Ontario to Washington, D.C. Reagan-National Airport?
Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 7h 36m.
Which layover airport has the shortest connection time from Ontario to Washington, D.C. Reagan-National Airport?
Atlanta (ATL) has the shortest average layover time for this route: 1h 22m.
When to book flights from Ontario to Washington, D.C. Reagan-National Airport
Cheap Ontario to Washington, D.C. Reagan-National Airport (ONT to DCA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Washington, D.C. Reagan-National Airport
Frequently asked questions about flying from Ontario to Washington, D.C. Reagan-National Airport
How far is Ontario to Washington, D.C. Reagan-National by plane?
The distance between Ontario and Washington, D.C. Reagan-National is about 2260.8 mi. A reasonable flight in good conditions will take 6h 56m.
When did momondo last update prices for flights from Ontario Airport to Washington, D.C. Reagan-National Airport?
Prices for flights from Ontario Airport to Washington, D.C. Reagan-National Airport were last updated today.
How many operators does momondo search for flights from Ontario Airport to Washington, D.C. Reagan-National Airport?
The number of operators available for flights from Ontario Airport to Washington, D.C. Reagan-National Airport is 5 as of October 2026.
How old do you have to be to fly from Ontario Airport to Washington, D.C. Reagan-National Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Washington, D.C. Reagan-National Airport.
What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?
The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Ontario to Washington, D.C. Reagan-National Airport?
momondo data reveals that the most frequently booked airline on the route from Ontario to Washington, D.C. Reagan-National Airport is Frontier, representing 30% of all bookings. The subsequent popular airlines are Southwest at 30%, American Airlines at 20%, and United Airlines at 13%.
Best airlines flying from Ontario to Washington, D.C. Reagan-National Airport
Compare and see reviews for airlines that fly from Ontario to Washington, D.C. Reagan-National Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $172 | Free Cancellation | Rating 5.5 2,542 reviews | |||
| PriceFrom $208 | Free Cancellation | Rating 7.8 8,654 reviews | |||
| PriceFrom $310 | Free Cancellation | Rating 7.4 10,348 reviews | |||
| PriceFrom $336 | Free Cancellation | Rating 7.0 12,150 reviews | |||
| PriceFrom $346 | Free Cancellation | Rating 7.9 4,221 reviews |
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Why should I use momondo to find a flight deal from Ontario to Washington, D.C.?
It is quick and easy to find Ontario to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.
Can I find flights from Ontario to Washington, D.C. with flexible booking policies on momondo?
All flight searches from Ontario to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ontario to Washington, D.C.?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Washington, D.C..
I’m not ready to book a flight from Ontario to Washington, D.C. right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Ontario and alert you when they change.