$617 Cheap Flights from Washington (IAD) to Islay (ILY)

View $617 flight on Sun, May 10, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Islay (ILY)

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Cheap Flights from Washington to Islay (IAD-ILY)

Prices were available within the past 7 days and start at $617 for one-way flights and $1,040 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, Dec 15 - Tue, Dec 23
IAD
Washington
ILY
Islay Island
$1,040 Roundtrip, found 1 day ago
$1,040
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, Dec 15 from Washington to Islay Island, returning Tue, Dec 23, priced at $1,040 found 1 day ago
British Airways
Mon, Dec 15 - Tue, Dec 23
IAD
Washington
ILY
Islay Island
$1,159 Roundtrip, found 1 day ago
$1,159
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, Dec 15 from Washington to Islay Island, returning Tue, Dec 23, priced at $1,159 found 1 day ago
Icelandair
Sat, Jan 10 - Mon, Jan 12
IAD
Washington
ILY
Islay Island
$1,213 Roundtrip, found 2 days ago
$1,213
Roundtrip
found 2 days ago
Select Icelandair flight, departing Sat, Jan 10 from Washington to Islay Island, returning Mon, Jan 12, priced at $1,213 found 2 days ago
British Airways
Sat, Jan 10 - Mon, Jan 12
IAD
Washington
ILY
Islay Island
$1,286 Roundtrip, found 2 days ago
$1,286
Roundtrip
found 2 days ago
Select British Airways flight, departing Sat, Jan 10 from Washington to Islay Island, returning Mon, Jan 12, priced at $1,286 found 2 days ago
British Airways
Wed, Dec 17 - Tue, Dec 23
IAD
Washington
ILY
Islay Island
$1,299 Roundtrip, found 1 day ago
$1,299
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Dec 17 from Washington to Islay Island, returning Tue, Dec 23, priced at $1,299 found 1 day ago
British Airways
Sat, Jan 10 - Mon, Jan 12
IAD
Washington
ILY
Islay Island
$1,302 Roundtrip, found 2 days ago
$1,302
Roundtrip
found 2 days ago
Select British Airways flight, departing Sat, Jan 10 from Washington to Islay Island, returning Mon, Jan 12, priced at $1,302 found 2 days ago
Aer Lingus
Mon, Dec 15 - Sat, Dec 20
IAD
Washington
ILY
Islay Island
$1,366 Roundtrip, found 1 day ago
$1,366
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Mon, Dec 15 from Washington to Islay Island, returning Sat, Dec 20, priced at $1,366 found 1 day ago
British Airways
Wed, Dec 17 - Tue, Dec 23
IAD
Washington
ILY
Islay Island
$1,418 Roundtrip, found 1 day ago
$1,418
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Dec 17 from Washington to Islay Island, returning Tue, Dec 23, priced at $1,418 found 1 day ago
Aer Lingus
Thu, Dec 18 - Sun, Dec 21
IAD
Washington
ILY
Islay Island
$1,424 Roundtrip, found 1 day ago
$1,424
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Thu, Dec 18 from Washington to Islay Island, returning Sun, Dec 21, priced at $1,424 found 1 day ago
British Airways
Thu, Dec 18 - Tue, Dec 23
IAD
Washington
ILY
Islay Island
$1,450 Roundtrip, found 1 day ago
$1,450
Roundtrip
found 1 day ago
Select British Airways flight, departing Thu, Dec 18 from Washington to Islay Island, returning Tue, Dec 23, priced at $1,450 found 1 day ago

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY) cost?
Snag a cheap one-way flight from $617 or cheap return flight from $1,040 from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY)?
Planning your getaway for December is a great way to save, as it's the cheapest month for flights between IAD and ILY. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY)?
To find the cheapest airline that'll fly you from IAD to ILY, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY)?
There aren't any daily direct flights departing from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from IAD to ILY?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change depending on a number of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY) route, fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY) last-minute?
Holding off until just before your trip to book your flight from IAD to ILY often results in higher prices. While you may come across some last-minute offers, they're not always guaranteed. Keep your travel schedule open for a better chance of scoring a bargain.
Is it cheaper to book an IAD to ILY flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to ILY flight and hotel package with Expedia could result in significant savings. Better yet, having it all in one place takes the hassle out of travel planning. Just secure your flights and choose from our extensive range of hotels, then tailor your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Islay Airport (ILY)?
Generally, it's possible to reschedule or cancel your IAD to ILY flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Islay
Roundtrip price
$1,040
Distance
3361 mi

Book with confidence

Washington to Islay Flights

The cheapest times to fly from Washington to Islay

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Islay are during the month of December. You can find some of the cheapest flights from Washington to Islay with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Islay

Sunday is one of the best days to book for cheap flights from Washington to Islay: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Islay

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Islay in 2025. You can also book with separate airlines for your outbound and return journeys, from $617 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Islay flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Islay airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Islay Flights

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*Available to One Key members.