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Cheap flights Ontario — Washington

Ontario (ONT, US) Washington (WAS, US)
from $125 3 640 km ~4h 47m 4 flights found 1 airlines cheapest on Thursday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $125 on 10.12.2026
Prices shown are from searches by other travellers over the last 24 hours. Missing a date? Click any day — we'll find tickets anyway.
November 2026
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Tu
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Th
Fr
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Su
December 2026
Mo
Tu
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Th
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January 2027
Mo
Tu
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Th
Fr
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Prices found for 4 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
10 Dec 2026, Thu
Frontier Airlines F9 2908
22:30
ONT Ontario International Airport
04:14
DCA Ronald Reagan National Airport
5h 44m 1 stop
Farera
$125
View this ticket
14 Nov 2026, Sat
Frontier Airlines F9 1262
22:52
ONT Ontario International Airport
04:28
DCA Ronald Reagan National Airport
5h 36m 1 stop
Trip.com
$215
View this ticket
13 Nov 2026, Fri
Frontier Airlines F9 1262
22:52
ONT Ontario International Airport
04:28
DCA Ronald Reagan National Airport
5h 36m 1 stop
Farera
$244
View this ticket
03 Jan 2027, Sun
Frontier Airlines F9 4206
09:51
ONT Ontario International Airport
15:23
IAD Washington Dulles International Airport
5h 32m 1 stop
Farera
$379
View this ticket
Route characteristics
Distance
3 640 km
Flight time
4h 47m
Time difference
+3h
Minimum price
from $125 (10.12.2026)
Average price
$241
Maximum price
$379
Cheapest day
Thursday
Departure airports (1)
ONT Ontario International Airport
Arrival airports (2)
DCA Ronald Reagan National Airport IAD Washington Dulles International Airport
Airlines (1)
F9 Frontier Airlines
Agencies (2)
Farera Trip.com
Prices by day of week
Thursday
$125
avg $125
Cheapest
Friday
$244
avg $244
Saturday
$215
avg $215
Sunday
$379
avg $379
Price trend by month
November 2026
from $215
avg $230
2 flights
December 2026
from $125
avg $125
1 flights
January 2027
from $379
avg $379
1 flights
Airlines — cheapest prices 1
Frontier Airlines
Frontier Airlines
Low-cost 4 flights · 4 days
$125
Where to buy tickets 2
Farera
3 tickets · 3 days
from $125
Trip.com
1 tickets · 1 days
from $215
Airports

From — Ontario (1)

  • ONT Ontario International Airport

To — Washington (2)

  • DCA Ronald Reagan National Airport
  • IAD Washington Dulles International Airport
Other destinations from Ontario
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AU
San Andres Island
CO
Malaga
ES · Hub
Auckland
NZ
Almaty
KZ
Alicante
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Ahmedabad
IN
Amsterdam
NL · Hub
Anchorage
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Frequently asked questions about the route Ontario — Washington
How long is the flight from Ontario to Washington?
Approximate flight time — 4h 47m. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Ontario to Washington?
The straight-line distance — 3 640 km.
How much do flights from Ontario to Washington cost?
The minimum price over 3 months — from $125 on 10.12.2026.
What is the average ticket price?
The average price — $241. Range: $125 — $379.
What is the time difference between Ontario and Washington?
The difference — +3h.
From which airports does Ontario operate flights?
From Ontario: ONT (Ontario International Airport).
To which airports in Washington do flights arrive?
To Washington: DCA (Ronald Reagan National Airport), IAD (Washington Dulles International Airport).
Which airlines fly this route?
This route is served by 1 airline: Frontier Airlines.
Which day of the week is cheapest?
The cheapest day of the week — Thursday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route Ontario — Washington

Flights Ontario — Washington is a popular route. The straight-line distance is 3 640 km. Flight time 4h 47m. Time difference +3h.

From Ontario (ONT) flights depart from 1 airport: ONT. To Washington (WAS) — 2 arrival airports: DCA, IAD.

1 airline operate on this route: Frontier Airlines.

The minimum price for the next 3 months — from $125 (10.12.2026). The cheapest dates are highlighted in the calendar above.

The average ticket price — $241, ranging from $125 to $379. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Thursday.

Other destinations in United States from Ontario
Philadelphia
US
Oklahoma City
US
Omaha
US
Orlando
US
Everett
US
West Palm Beach
US
Portland
US
Palm Springs
US

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