For a smooth departure, use the Aerotrain to navigate between terminals, but be prepared for long walks from the train to certain gates.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | Gurufare 3 stars |
Round-trip from | $484 (United) |
One-way from | $270 (Mytrip) |
Popular in | June |
Cheapest in | January |
Average price | $637 |
Good round-trip deal | $635 or less |
Good one-way deal | $413 or less |
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Sun 11/9
10:20 pm-10:20 am
Nonstop7h 00m
Dublin
Tue 11/18
5:00 am-3:50 pm
1 stop15h 50m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Wed 2/11
6:20 pm-9:40 am
1 stop10h 20m
Dublin
Mon 2/16
5:55 pm-3:35 pm
1 stop26h 40m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Wed 11/26
10:20 pm-10:20 am
Nonstop7h 00m
Dublin
Fri 12/5
12:05 pm-3:20 pm
Nonstop8h 15m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Wed 11/26
12:11 pm-8:05 am
2 stops14h 54m
Dublin
Wed 12/3
8:50 am-4:05 pm
1 stop12h 15m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Sun 11/9
10:20 pm-10:20 am
Nonstop7h 00m
Dublin
Sun 11/16
5:10 am-3:50 pm
1 stop15h 40m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Sun 11/30
10:20 pm-10:20 am
Nonstop7h 00m
Dublin
Sun 12/7
9:00 am-8:26 pm
1 stop16h 26m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Thu 2/19
10:20 pm-10:20 am
Nonstop7h 00m
Dublin
Mon 2/23
1:20 pm-4:40 pm
1 stop32h 20m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Thu 11/13
10:20 pm-10:20 am
Nonstop7h 00m
Dublin
Wed 11/26
9:00 am-3:46 pm
1 stop11h 46m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Tue 11/18
5:25 pm-9:55 am
1 stop11h 30m
Dublin
Sun 11/23
9:00 am-9:22 pm
2 stops17h 22m
Washington, D.C.Dublin
IAD - DUB
IADDUB
Washington, D.C. Dulles Intl
Thu 12/4
10:20 pm-10:20 am
Nonstop7h 00m
Dublin
Wed 12/10
12:05 pm-3:20 pm
Nonstop8h 15m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The best time to book flights from Washington, D.C. Dulles Intl Airport to Dublin is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Dublin (average of $371). Flying from Washington, D.C. Dulles Intl Airport to Dublin in June is currently the most expensive (average of $535). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Dublin in the evening. Doing so could potentially save you 24% on the flight price compared to flying in the morning, which is usually more expensive.
About 21% of weekly flights between Washington, D.C. and Dublin have experienced delays in the past year, with the average delay time being 164 minutes.
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Aer Lingus have had the lowest number of delays on this route, with just 17% of flights being delayed.
Reykjavik (KEF) – chosen by Cheapflights users on 67% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Dublin on Cheapflights.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 9h 35m.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 9h 35m.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 44m.
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
Sebrena,Oct 2025
IAH - RSW
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
Sebrena,Oct 2025
IAH - RSW
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
Sebrena,Oct 2025
IAH - RSW
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
Sebrena,Oct 2025
IAH - RSW
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
Sebrena,Oct 2025
IAH - RSW
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
Sebrena,Oct 2025
IAH - RSW
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$316 | Average$495 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$371 | Average$617 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$427 | Average$595 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$456 | Average$494 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$469 | Average$682 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$484 | Average$638 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$527 | Average$836 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$601 | Average$888 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$696 | Average$854 | FlexibilityNo cancel fee | On-time76% |