$395 Cheap Icelandair flights Washington (IAD) to London (LGW)

View $395 flight on Wed, Oct 15, 2025Opens in a new window

$395 Cheap Icelandair flights Washington (IAD) to London (LGW)

Prices were available within the past 7 days and start at $395 for one-way flights and $470 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Fri, Jan 23 - Mon, Jan 26
IAD
Washington
LGW
London
$470 Roundtrip, just found
$470
Roundtrip
just found
Select Icelandair flight, departing Fri, Jan 23 from Washington to London, returning Mon, Jan 26, priced at $470 just found
Icelandair
Thu, Oct 30 - Tue, Nov 4
IAD
Washington
LGW
London
$476 Roundtrip, found 3 hours ago
$476
Roundtrip
found 3 hours ago
Select Icelandair flight, departing Thu, Oct 30 from Washington to London, returning Tue, Nov 4, priced at $476 found 3 hours ago
Icelandair
Tue, Sep 23 - Sat, Oct 4
IAD
Washington
LGW
London
$476 Roundtrip, found 2 days ago
$476
Roundtrip
found 2 days ago
Select Icelandair flight, departing Tue, Sep 23 from Washington to London, returning Sat, Oct 4, priced at $476 found 2 days ago
Icelandair
Fri, Jan 2 - Mon, Jan 12
IAD
Washington
LGW
London
$565 Roundtrip, found 2 days ago
$565
Roundtrip
found 2 days ago
Select Icelandair flight, departing Fri, Jan 2 from Washington to London, returning Mon, Jan 12, priced at $565 found 2 days ago
Icelandair
Mon, Dec 8 - Sat, Dec 13
IAD
Washington
LGW
London
$592 Roundtrip, just found
$592
Roundtrip
just found
Select Icelandair flight, departing Mon, Dec 8 from Washington to London, returning Sat, Dec 13, priced at $592 just found
Icelandair
Fri, Oct 17 - Tue, Oct 21
IAD
Washington
LGW
London
$593 Roundtrip, found 1 hour ago
$593
Roundtrip
found 1 hour ago
Select Icelandair flight, departing Fri, Oct 17 from Washington to London, returning Tue, Oct 21, priced at $593 found 1 hour ago
Icelandair
Thu, Oct 30 - Sat, Nov 8
IAD
Washington
LGW
London
$598 Roundtrip, found 2 hours ago
$598
Roundtrip
found 2 hours ago
Select Icelandair flight, departing Thu, Oct 30 from Washington to London, returning Sat, Nov 8, priced at $598 found 2 hours ago
Icelandair
Fri, Sep 12 - Sat, Oct 4
IAD
Washington
LGW
London
$598 Roundtrip, just found
$598
Roundtrip
just found
Select Icelandair flight, departing Fri, Sep 12 from Washington to London, returning Sat, Oct 4, priced at $598 just found
Flights from Washington (IAD) to London (LGW)
Origin airport
Washington Dulles Intl.
Destination airport
Gatwick
Airlines serving
American Airlines, British Airways, Delta, ITA Airways, Iberia, Icelandair, KLM, Royal Air Maroc, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic
Popular airline
TAP Portugal
Distance
3685 mi

Frequently asked questions

How much is an Icelandair flight from Washington Dulles Intl. Airport (IAD) to Gatwick Airport (LGW)?
You can find affordable round-trip Icelandair flights from $470 from IAD to LGW by sorting your results from "Price (lowest to highest)" on Expedia. Or search for options from $395 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to LGW with Icelandair?
Browse for one-way or round-trip flights to London in January or February. You could find a cheap fare with Icelandair during these quieter months.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to Gatwick Airport (LGW) with Icelandair?
Landing the best Icelandair deals from IAD to LGW often comes down to timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. As an added bonus, you can pocket 17% on average by buying your tickets on a Sunday compared to a Friday, which is usually the most expensive day to book.* It's smart to kick off your flight search about one month before your travel dates.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Icelandair fly nonstop from Washington Dulles Intl. Airport (IAD) to Gatwick Airport (LGW)?
Use the "Nonstop" filter when browsing for direct Icelandair flights from IAD to LGW. It's also an easy way to compare other carriers offering the same nonstop journey.
What is the earliest Icelandair flight from IAD to LGW?
Filter your results by "Morning" and "Early Morning" to find the earliest departures from IAD to LGW. Jetting off early means you're 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Icelandair fly into in London?
Gatwick Airport (LGW) is the main London hub for Icelandair flights from Washington Dulles Intl. Airport (IAD).
What kind of luggage can I take on an Icelandair flight from Washington Dulles Intl. Airport (IAD) to Gatwick Airport (LGW)?
On Icelandair, you can fly standard economy from IAD to LGW with a small personal item and 1 cabin bag. Your carry-on bag should be no bigger than 21 inches x 7 inches x 13 inches and weigh under 13 lb. Going over these restrictions may lead to additional charges, so read your airline's latest guidelines before confirming your booking.
Why fly with Icelandair from IAD to LGW?
Offering a rewarding loyalty program and top-tier customer service, Icelandair is a favorite for many passengers flying from IAD to LGW. Also, if you're an Icelandair Saga Club and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be put toward future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Icelandair flight from Washington Dulles Intl. Airport (IAD) to Gatwick Airport (LGW)?
Depending on your fare type, a fee will generally apply if you cancel or change your flight more than 24 hours after it's confirmed. To find flexible fares, select our "No cancel fee" or "Changes included" filter while searching for flights. For more details on changing or canceling your reservation, head to "Trips," select your flight and tick "Manage Booking."

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*Available to One Key members.