What are the cheapest airlines flying from Key West to Washington, D.C. Dulles Intl Airport round-trip?

According to our current data, Delta ($209), United Airlines ($313), and Allegiant Air ($337) offers the cheapest pricing from Key West to Washington, D.C. Dulles Intl Airport.

What are the cheapest airlines to fly from Key West to Washington, D.C. Dulles Intl Airport one-way?

One-way options have recently been found by users for as low as $137 on Allegiant Air. Other airlines that offer cheap prices include United Airlines from $227 and Delta from $329 one-way.

What is the cheapest month to book a flight from Key West to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Key West to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Key West to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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.

What is the cheapest day to fly from Key West to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Key West to Washington, D.C. Dulles Intl Airport flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the cheapest flights from Key West to Washington, D.C. Dulles Intl Airport?

Looking at all options, your cheapest flight can be booked for $588. While the most popular route (Key West - Washington, D.C. Dulles Intl) can be booked for $262 on average our data indicates $588 when flying from Key West to Washington, D.C. Dulles Intl Airport.

What is the cheapest month to fly from Key West to Washington, D.C. Dulles Intl Airport?

Flights from Key West to Washington, D.C. Dulles Intl Airport lean towards being more expensive in March. Prices are generally better when you fly from Key West to Washington, D.C. Dulles Intl Airport in July, with the cheapest ticket starting at $258.

What is the cheapest time of day to fly from EYW to IAD?

Unlike at noon, when flights are generally more expensive, you can save up to 68% on flights from Key West to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the afternoon.

What airport do you fly from for flights from Key West to Washington, D.C. Dulles Intl?

Most people fly from Key West (EYW) if they book a flight from Key West to Washington, D.C. Dulles Intl. On average, Key West has 0 outbound flights to Washington, D.C. Dulles Intl per day from 1 airline. Key West is conveniently located just 2.6 mi from Key West’s city center.

Can I find deals for flights from Key West to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Key West to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Key West to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key West to Dulles Intl.

Can I find deals for business class flights from Key West to Dulles Intl?

Yes. Cheapflights offers flight deals from Key West to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$137+ Flights from Key West to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Key West to Dulles Intl

Round-trip from	$209 (Delta)
One-way from	$137 (Mytrip)
Popular in	March
Cheapest in	July
Average price	$363
Good one-way deal	$588 or less

From Key West to Washington, D.C. Dulles Intl

Search Deals

One-way flight from Key West to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 25% potential increase in price ($140 potential increase over avg. RT price).

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Cheapest flight prices on average. 7% potential price decrease ($29 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Price to beat on a one-way flight from Key West to Washington, D.C. Dulles Intl.

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Find flight deals from Key West to Dulles Intl

Cheapest flights from Key West to Dulles Intl
Explore the most affordable flight options available from Key West to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Wed 7/27:10 amEYW - IAD

1 stop4h 43mDelta

Sat 7/52:00 pmIAD - EYW

1 stop5h 39mDelta

Deal found 6/9

$209

Fri 8/16:45 pmEYW - IAD

1 stop21h 34mUnited Airlines

Sun 8/310:10 pmIAD - EYW

1 stop15h 50mUnited Airlines

Deal found 6/10

$313

Thu 7/34:20 pmEYW - IAD

1 stop17h 03mAllegiant Air

Sat 7/52:40 pmIAD - EYW

2 stops24h 50mAllegiant Air

Deal found 6/9

$337

Fri 8/110:23 amEYW - IAD

2 stops25h 01mMultiple Airlines

Sun 8/33:53 pmIAD - EYW

2 stops23h 23mMultiple Airlines

Deal found 6/11

$343

Fri 8/112:47 pmEYW - IAD

1 stop6h 49mAmerican Airlines

Sun 8/39:03 amIAD - EYW

1 stop5h 11mAmerican Airlines

Deal found 6/12

$424

Best flights from Key West to Dulles Intl
Discover carefully curated flight deals from Key West to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Wed 7/27:10 amEYW - IAD

1 stop4h 43mDelta

Sat 7/52:00 pmIAD - EYW

1 stop5h 39mDelta

Deal found 6/9

$209

Fri 8/16:45 pmEYW - IAD

1 stop21h 34mUnited Airlines

Sun 8/310:10 pmIAD - EYW

1 stop15h 50mUnited Airlines

Deal found 6/10

$313

Thu 7/34:20 pmEYW - IAD

1 stop17h 03mAllegiant Air

Sat 7/52:40 pmIAD - EYW

2 stops24h 50mAllegiant Air

Deal found 6/9

$337

Fri 8/110:23 amEYW - IAD

2 stops25h 01mMultiple Airlines

Sun 8/33:53 pmIAD - EYW

2 stops23h 23mMultiple Airlines

Deal found 6/11

$343

Fri 8/112:47 pmEYW - IAD

1 stop6h 49mAmerican Airlines

Sun 8/39:03 amIAD - EYW

1 stop5h 11mAmerican Airlines

Deal found 6/12

$424

Last-minute flights from Key West to Dulles Intl
Discover last-minute flight deals from Key West to Dulles Intl. Data last updated June 12, 2025 and is based on user searches.

Wed 6/183:02 pmEYW - IAD

1 stop4h 42mAmerican Airlines

Thu 6/195:41 pmIAD - EYW

2 stops17h 09mAmerican Airlines

Deal found 6/12

$817

Wed 6/182:12 pmEYW - IAD

1 stop7h 01mUnited Airlines

Thu 6/198:45 amIAD - EYW

1 stop27h 30mUnited Airlines

Deal found 6/12

$921

Wed 7/27:10 amEYW - IAD

1 stop4h 43mDelta

Sat 7/52:00 pmIAD - EYW

1 stop5h 39mDelta

Deal found 6/9

$209

Wed 7/210:44 amEYW - IAD

2 stops24h 42mMultiple Airlines

Sat 7/52:40 pmIAD - EYW

2 stops24h 50mMultiple Airlines

Deal found 6/9

$352

Thu 7/34:20 pmEYW - IAD

1 stop17h 03mAllegiant Air

Sat 7/52:40 pmIAD - EYW

2 stops24h 50mAllegiant Air

Deal found 6/9

$337

Tue 7/82:45 pmEYW - IAD

1 stop23h 35mUnited Airlines

Tue 7/153:30 pmIAD - EYW

1 stop16h 30mUnited Airlines

Deal found 6/9

$363

Sat 7/1911:39 amEYW - IAD

2 stops7h 57mAmerican Airlines

Tue 7/226:35 amIAD - EYW

2 stops6h 20mAmerican Airlines

Deal found 6/9

$434

One-way flights from Key West to Dulles Intl
Search for one-way flight options from Key West to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Sun 7/274:20 pmEYW - IAD

1 stop17h 03mAllegiant Air

Deal found 6/11

$137

Sun 6/292:45 pmEYW - IAD

1 stop20h 35mUnited Airlines

Deal found 6/10

$227

Sun 6/298:53 amEYW - IAD

3 stops31h 22mMultiple Airlines

Deal found 6/10

$307

Fri 6/277:10 amEYW - IAD

1 stop4h 44mDelta

Deal found 6/10

$329

Fri 6/274:45 pmEYW - IAD

1 stop7h 14mAmerican Airlines

Deal found 6/9

$334

Cheapflights Fare Finder

Use the filters below to find and compare flights from Key West to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Wed 7/2

7:10 am-11:53 am

1 stop4h 43m

Washington, D.C. Dulles Intl

Sat 7/5

2:00 pm-7:39 pm

1 stop5h 39m

$209

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Fri 8/1

6:45 pm-4:19 pm

1 stop21h 34m

Washington, D.C. Dulles Intl

Sun 8/3

10:10 pm-2:00 pm

1 stop15h 50m

$313

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Thu 7/3

4:20 pm-9:23 am

1 stop17h 03m

Washington, D.C. Dulles Intl

Sat 7/5

2:40 pm-3:30 pm

2 stops24h 50m

$337

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Fri 8/1

10:23 am-11:24 am

2 stops25h 01m

Washington, D.C. Dulles Intl

Sun 8/3

3:53 pm-3:16 pm

2 stops23h 23m

$343

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Fri 8/1

12:47 pm-7:36 pm

1 stop6h 49m

Washington, D.C. Dulles Intl

Sun 8/3

9:03 am-2:14 pm

1 stop5h 11m

$424

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Sun 7/27

4:20 pm-9:23 am

1 stop17h 03m

$137

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Sun 6/29

2:45 pm-11:20 am

1 stop20h 35m

$227

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Sun 6/29

8:53 am-4:15 pm

3 stops31h 22m

$307

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Fri 6/27

7:10 am-11:54 am

1 stop4h 44m

$329

Key WestWashington, D.C.

EYW - IAD

EYWIAD

Key West

Fri 6/27

4:45 pm-11:59 pm

1 stop7h 14m

$334

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Best time to book a flight from Key West to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Key West with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Key West to Washington, D.C. Dulles Intl Airport

Rainfall in Dulles Intl by month

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Dulles Intl

Get a feel of what it's like to fly with Delta, United Airlines and Allegiant Air from Key West to Washington, D.C. by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

6.0

Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Delta

8.0

Very good

7,950 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

6.0

Good

pilar,May 2025

RSW - ATL

United Airlines

7.4

Good

8,790 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

6.0

Good

pilar,May 2025

RSW - ATL

Allegiant Air

7.3

Good

725 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

6.0

Good

pilar,May 2025

RSW - ATL

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

6.0

Good

pilar,May 2025

RSW - ATL

Related info for your journey

What airport do you fly from for flights from Key West to Washington, D.C. Dulles Intl?
Most people fly from Key West (EYW) if they book a flight from Key West to Washington, D.C. Dulles Intl. On average, Key West has 0 outbound flights to Washington, D.C. Dulles Intl per day from 1 airline. Key West is conveniently located just 2.6 mi from Key West’s city center.
What are the cheapest airlines flying from Key West to Washington, D.C. Dulles Intl Airport round-trip?
According to our current data, Delta ($209), United Airlines ($313), and Allegiant Air ($337) offers the cheapest pricing from Key West to Washington, D.C. Dulles Intl Airport.
What are the cheapest airlines to fly from Key West to Washington, D.C. Dulles Intl Airport one-way?
One-way options have recently been found by users for as low as $137 on Allegiant Air. Other airlines that offer cheap prices include United Airlines from $227 and Delta from $329 one-way.
What are the cheapest flights from Key West to Washington, D.C. Dulles Intl Airport?
Looking at all options, your cheapest flight can be booked for $588. While the most popular route (Key West - Washington, D.C. Dulles Intl) can be booked for $262 on average our data indicates $588 when flying from Key West to Washington, D.C. Dulles Intl Airport.
Can I find deals for flights from Key West to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Key West to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Key West to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key West to Dulles Intl.
Can I find deals for business class flights from Key West to Dulles Intl?
Yes. Cheapflights offers flight deals from Key West to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Key West to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Key West to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Key West to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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.

See more FAQs

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Top airline flying from Key West to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$223	Average$293	FlexibilityNo cancel fee	On-timeN/A

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$137+ Cheap flights from Key West (EYW) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Key West to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Key West to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good one-way deal

Find flight deals from Key West to Dulles Intl

Cheapest flights from Key West to Dulles IntlExplore the most affordable flight options available from Key West to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Explore the most affordable flight options available from Key West to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Key West to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Key West to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Key West with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Key West to Washington, D.C. Dulles Intl Airport

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

Related info for your journey

Find useful and relevant information for your journey from Key West to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Key West to Washington, D.C. Dulles Intl?

What are the cheapest airlines flying from Key West to Washington, D.C. Dulles Intl Airport round-trip?

What are the cheapest airlines to fly from Key West to Washington, D.C. Dulles Intl Airport one-way?

What are the cheapest flights from Key West to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Key West to Dulles Intl that include hotel bookings?

How can I find direct flights from Key West to Dulles Intl?

Can I find deals for business class flights from Key West to Dulles Intl?

What is the cheapest month to book a flight from Key West to Washington, D.C. Dulles Intl Airport?

Traveling to a place near Key West?

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Alternative routes for Key West to Dulles Intl

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Top airline flying from Key West to Dulles Intl

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Cheapest flights from Key West to Dulles Intl
Explore the most affordable flight options available from Key West to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.