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Cheap flights from the United States to Donegal from €471

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Donegal departing on 18/2. 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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Find the cheapest flights from the United States to Donegal

Recent return flight deals from the United States to Donegal

Enter your travel dates to find the best prices.
British Airways Logo
17:25 - 20:00
DEN
-
CFN
19h 35m
2 stops
British Airways Logo
13:00 - 15:30
CFN
-
DEN
57h 30m
2 stops
€471British Airways
Wed, 18 Feb - Sun, 22 Feb
British Airways Logo
17:25 - 20:00
DEN
-
CFN
19h 35m
2 stops
British Airways Logo
13:00 - 15:30
CFN
-
DEN
57h 30m
2 stops
€472British Airways
Wed, 18 Feb - Sun, 22 Feb
British Airways Logo
21:45 - 20:00
IAD
-
CFN
17h 15m
2 stops
British Airways Logo
07:55 - 19:55
CFN
-
IAD
17h 00m
2 stops
€625British Airways
Tue, 3 Feb - Sat, 14 Feb
British Airways Logo
20:35 - 20:00
BWI
-
CFN
18h 25m
2 stops
British Airways Logo
07:55 - 18:45
CFN
-
BWI
15h 50m
2 stops
€625British Airways
Tue, 3 Feb - Sat, 14 Feb
Aer Lingus Logo
17:05 - 14:00
IAD
-
CFN
15h 55m
1 stop
Aer Lingus Logo
14:30 - 15:35
CFN
-
IAD
30h 05m
1 stop
€667Aer Lingus
Tue, 3 Feb - Sat, 14 Feb
Multiple Airlines Logo
17:30 - 20:00
IAD
-
CFN
21h 30m
3 stops
Multiple Airlines Logo
07:55 - 21:00
CFN
-
IAD
42h 05m
3 stops
€706Multiple Airlines
Tue, 3 Feb - Sat, 14 Feb
Multiple Airlines Logo
18:20 - 20:00
IAD
-
CFN
20h 40m
2 stops
Multiple Airlines Logo
07:55 - 15:35
CFN
-
IAD
12h 40m
1 stop
€769Multiple Airlines
Tue, 3 Feb - Sat, 14 Feb
Multiple Airlines Logo
16:30 - 20:00
IAD
-
CFN
22h 30m
2 stops
Multiple Airlines Logo
07:55 - 21:00
CFN
-
IAD
42h 05m
3 stops
€841Multiple Airlines
Tue, 3 Feb - Sat, 14 Feb
Multiple Airlines Logo
17:20 - 14:00
DCA
-
CFN
15h 40m
2 stops
Multiple Airlines Logo
07:55 - 21:20
CFN
-
DCA
18h 25m
2 stops
€931Multiple Airlines
Tue, 3 Feb - Sat, 14 Feb
Multiple Airlines Logo
21:45 - 18:45
IAD
-
CFN
40h 00m
2 stops
Multiple Airlines Logo
10:40 - 15:35
CFN
-
IAD
33h 55m
2 stops
€2,599Multiple Airlines
Fri, 27 Feb - Fri, 6 Mar

British Airways flights from United States to Donegal

Our best British Airways deals on United States to Donegal flight tickets
British Airways
18 Feb
DEN17:25Denver Intl
19h 35m
2 stops
CFN20:00Donegal
22 Feb
CFN13:00Donegal
57h 30m
2 stops
DEN15:30Denver Intl
€471
British Airways
18 Feb
DEN17:25Denver Intl
19h 35m
2 stops
CFN20:00Donegal
22 Feb
CFN13:00Donegal
57h 30m
2 stops
DEN15:30Denver Intl
€472
British Airways
3 Feb
IAD21:45Washington, D.C. Dulles Intl
17h 15m
2 stops
CFN20:00Donegal
14 Feb
CFN07:55Donegal
17h 00m
2 stops
IAD19:55Washington, D.C. Dulles Intl
€625

momondo Fare Finder

 
Customise your flight search to find flights from United States to Donegal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 13,528 searches. Data last updated 14 January 2026.
Use the filters below to find and compare flights from the United States to Donegal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverDonegal

DEN - CFN

DENCFN

Denver Intl

Wed 18/2

17:25-20:00

2 stops19h 35m

Donegal

Sun 22/2

13:00-15:30

2 stops57h 30m

€471

DenverDonegal

DEN - CFN

DENCFN

Denver Intl

Wed 18/2

17:25-20:00

2 stops19h 35m

Donegal

Sun 22/2

13:00-15:30

2 stops57h 30m

€472

Washington, D.C.Donegal

IAD - CFN

IADCFN

Washington, D.C. Dulles Intl

Tue 3/2

21:45-20:00

2 stops17h 15m

Donegal

Sat 14/2

07:55-19:55

2 stops17h 00m

€625

BaltimoreDonegal

BWI - CFN

BWICFN

Baltimore/Washington

Tue 3/2

20:35-20:00

2 stops18h 25m

Donegal

Sat 14/2

07:55-18:45

2 stops15h 50m

€625

Washington, D.C.Donegal

IAD - CFN

IADCFN

Washington, D.C. Dulles Intl

Tue 3/2

17:05-14:00

1 stop15h 55m

Donegal

Sat 14/2

14:30-15:35

1 stop30h 05m

€667

Washington, D.C.Donegal

IAD - CFN

IADCFN

Washington, D.C. Dulles Intl

Tue 3/2

17:30-20:00

3 stops21h 30m

Donegal

Sat 14/2

07:55-21:00

3 stops42h 05m

€706

Washington, D.C.Donegal

IAD - CFN

IADCFN

Washington, D.C. Dulles Intl

Tue 3/2

18:20-20:00

2 stops20h 40m

Donegal

Sat 14/2

07:55-15:35

1 stop12h 40m

€769

Washington, D.C.Donegal

IAD - CFN

IADCFN

Washington, D.C. Dulles Intl

Tue 3/2

16:30-20:00

2 stops22h 30m

Donegal

Sat 14/2

07:55-21:00

3 stops42h 05m

€841

Washington, D.C.Donegal

DCA - CFN

DCACFN

Washington, D.C. Reagan-National

Tue 3/2

17:20-14:00

2 stops15h 40m

Donegal

Sat 14/2

07:55-21:20

2 stops18h 25m

€931

Washington, D.C.Donegal

IAD - CFN

IADCFN

Washington, D.C. Dulles Intl

Fri 27/2

21:45-18:45

2 stops40h 00m

Donegal

Fri 6/3

10:40-15:35

2 stops33h 55m

€2,599

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Donegal from

How to get the cheapest flight ticket from United States to Donegal

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

How long does it take to fly to Donegal?

The average flight duration from United States to Donegal depends on which airport you fly into and out of. Flying from New York to Knock is 9h 35m on average, while flying from San Francisco to Knock is 34h 55m on average. Knock is the most popular airport in Donegal.

Cheap United States to Donegal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Donegal

Fastest flight time

15h 40m

Direct flights

None
The fastest flight from United States to Donegal takes 15h 40m
There are no direct flights from United States to Donegal. There are no popular flight routes from United States to Donegal.
Search flight deals

  • When did momondo last update prices for flights from United States to Donegal Airport?

    Prices for flights from United States to Donegal Airport refresh daily.

  • How old do you have to be to fly from United States to Donegal Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States to Donegal Airport.

  • What documentation or ID do you need to fly to Donegal Airport?

    The travel and health documents required for your trip to Donegal Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Donegal Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near Donegal?

Book flights to Donegal if you plan to visit one of these locations
Letterkenny
Bundoran
Killybegs

Why use momondo?

Why should I use momondo to find a flight deal from United States to Donegal?

Finding the right flight to Donegal from United States is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Donegal quick and easy, saving you time and money.

Can I find flights from United States to Donegal with flexible booking policies on momondo?

Yes. All flights to Donegal from United States on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from United States to Donegal?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Donegal from United States.

I’m not ready to book a flight from United States to Donegal right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Donegal from United States. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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