Cheap Flight Tickets from Ontario (ONT) to Washington (DCA), Starting at $215

Good to Know: Cheapest and Fastest ONT - DCA Flights

Useful information for finding best airline tickets from Ontario International to Ronald Reagan Washington National on your next trip.

Cheapest Round Trip Flight

$425

DL Delta Airlines • 1 stop • 12h 15m

Jul 18 – Jul 23

The cheapest round trip flight from Ontario to Washington (ONT-DCA-ONT) is currently $425

🔍 Search Flights

Cheapest One way Flight

$215

WN Southwest Airlines • 1 stop • 14h 15m

Aug 20

The cheapest one way flight from Ontario to Washington (ONT-DCA) is currently $215

🔍 Search Flights

Cheapest Direct Flight

$644

UA United Airlines • nonstop • 8h 26m

Jul 31

The cheapest nonstop flight from Ontario to Washington (ONT-DCA) is currently $644

🔍 Search Flights

Fastest Flight

8h 22m

The fastest nonstop flight from Ontario to Washington (ONT-DCA) takes 8h 22m

Top Airlines Flying from Ontario to Washington

American Airlines, AA

American Airlines

Delta Airline, DL

Delta Airlines

Southwest Airlines-WN

Southwest Airlines

United Airlines, UA

United Airlines

Alaska Airlines -AS

Alaska Airlines

Sun Country Airlines (SY)

Sun Country Airlines

Avianca Airline - AV

Avianca

Latest Flight Deals from Ontario (ONT) to Washington (DCA)

Compare and book low fare round-trip air tickets from Ontario to Washington. Ideal for travelers with confirmed return itineraries.

Jul 18 - Jul 23, Economy
DL
Ontario → Washington
12h 15m
6:00 AM - 4:35 PM • 1 stop
DL
Ontario → Washington
12h 38m
5:40 AM - 10:38 AM • 1 stop
$425
Delta Airlines
Jul 18 - Jul 23, Economy
DL
Ontario → Washington
13h 52m
7:05 AM - 6:37 PM • 1 stop
DL
Ontario → Washington
12h 30m
5:00 PM - 9:50 PM • 1 stop
$425
Delta Airlines
Jul 18 - Jul 23, Economy
DL
Ontario → Washington
15h 43m
7:05 AM - 7:48 PM • 1 stop
DL
Ontario → Washington
8h 54m
4:45 PM - 7:19 PM • nonstop
$433
Delta Airlines
Jul 18 - Jul 23, Economy
DL
Ontario → Washington
14h 12m
12:00 PM - 11:52 PM • 1 stop
DL
Ontario → Washington
8h 54m
4:45 PM - 7:19 PM • nonstop
$433
Delta Airlines
Jul 19 - Jul 24, Economy
AA
Ontario → Washington
13h 43m
10:10 PM - 9:33 AM • 1 stop
AA
Ontario → Washington
12h 22m
7:17 PM - 11:59 PM • 1 stop
$789
American Airlines
Jul 19 - Jul 24, Economy
AA
Ontario → Washington
15h 40m
10:10 PM - 10:50 AM • 1 stop
AA
Ontario → Washington
12h 22m
7:17 PM - 11:59 PM • 1 stop
$789
American Airlines

Fly from Ontario to Washington with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Ontario to Washington? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Ontario to Washington Flights

What are the airports in Ontario?
ONT
What’s the most popular airline flying from ONT to DCA?
The most popular airline flying from Ontario to Washington are
Can I fly from ONT to DCA non-stop?
Yes, you can fly ONT to DCA non-stop on
Which airlines fly nonstop between Ontario and Washington?
The non-stop flights between Ontario and Washington are .
What’s the earliest departure time from ONT to DCA Airport?
The earliest flight leaves ONT at 5:15 am and lands in DCA - Ronald Reagan Washington National
What are the airports in Washington?
IAD,BWI,DCA
Can I make changes to my Ontario to Washington flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from ONT to DCA?
Read the fare rules of the Ontario to Washington air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Ontario and Washington?
operate flights between Ontario and Washington
How long does a flight from Ontario to Washington take?
It takes approximately 5 hour to fly non-stop from ONT to DCA, which is 2264.8 miles by air.
Which airlines provide the cheapest flights from Ontario (ONT) to Washington (DCA) ?
In the past couple of days, the cheapest tickets to DCA from ONT were found on DL : USD 756
Do I need a passport to fly between ONT and DCA?
No
What’s the latest departure time from ONT to DCA ?
The last flight leaves ONT at 11:55 pm

Ontario (ONT) to Washington (DCA): Airport Information

Origin Airport Ontario International , Ontario, US
Destination Airport Ronald Reagan Washington National , Washington, US
Distance 2265 miles

More Flight Options for Ontario (ONT) and Washington (DCA)

Why Fareleaders for ONT to DCA Plane Tickets

Lowest Prices
Lowest Prices
Uncover the best deals on Ontario to Washington flights by comparing fares from hundreds of airlines and agencies.
New Deals
New Deals Everyday
Get the best prices on ONT to DCA flights—we update our fares daily so you never miss a saving.
Best Travel Options
No Service Fees
Compare hundreds of Ontario to Washington flights and secure the best deals—we never add any service fees.
Get Fare Drop Alert
Be the first to know when fares drop for the Ontario (ONT) to Washington (DCA)
Terms and Conditions*