What airlines fly to Washington, D.C.?

United Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to Washington, D.C. from Honolulu according to our data. United Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 6 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Honolulu to Washington, D.C.?

Phoenix (PHX) has the shortest average layover time for this route: 1h 24m.

What is the cheapest airline that flies from Honolulu to Washington, D.C.?

Delta, Alaska Airlines, and Southwest are the most popular carriers operating from Honolulu to Washington, D.C.

Which layover airport offers the lowest fares from Honolulu to Washington, D.C.?

Flights via Detroit (DTW) offer the lowest average round-trip price of $670.

Which airport is the most popular layover for flights between Honolulu and Washington, D.C.?

Seattle (SEA) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

How many flights depart from Honolulu to Washington, D.C. on average per week?

As of December 2025, 28 flights take off from Honolulu and land in Washington, D.C. each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.

Which layover airport has the shortest travel time from Honolulu to Washington, D.C.?

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 11h 08m.

How many flights depart from Honolulu to Washington, D.C. on average per day?

The number of flights available between Honolulu and Washington, D.C. is 4 per day as of December 2025. The most frequent departure time is 5:00PM, with 100% of daily flights leaving in the afternoon.

When did momondo last update prices for flights from Honolulu Airport to Washington, D.C.?

Prices for flights from Honolulu Airport to Washington, D.C. were last updated today.

How many operators does momondo search for flights from Honolulu Airport to Washington, D.C.?

There are 6 operators available for flights from Honolulu Airport to Washington, D.C. as of December 2025.

How old do you have to be to fly from Honolulu Airport to Washington, D.C.?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Honolulu Airport to Washington, D.C..

What documentation or ID do you need to fly to Washington, D.C.?

The travel and health documents required for your trip to Washington, D.C. 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 license, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$215 Cheap Flights from Honolulu to Washington, D.C. in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Honolulu to Washington, D.C.

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 4:26 pm

HNL

IAD

27h 26m1 stop

6:04 pm - 10:08 pm

IAD

HNL

33h 04m1 stop

$515Multiple Airlines

Thu, Jan 29 - Mon, Feb 2

2:20 pm - 9:59 pm

HNL

DCA

26h 39m1 stop

5:01 pm - 10:08 pm

DCA

HNL

34h 07m1 stop

$515Multiple Airlines

Thu, Jan 29 - Mon, Feb 2

1:17 pm - 11:52 am

HNL

IAD

17h 35m2 stops

7:30 am - 5:05 pm

IAD

HNL

14h 35m1 stop

$521Delta

Wed, Feb 4 - Sun, Feb 8

9:45 pm - 5:20 pm

HNL

IAD

14h 35m1 stop

7:05 am - 10:30 pm

IAD

HNL

20h 25m2 stops

$533Multiple Airlines

Thu, Feb 26 - Tue, Mar 3

8:00 am - 5:20 pm

HNL

IAD

28h 20m1 stop

7:05 am - 11:13 am

IAD

HNL

33h 08m1 stop

$534Multiple Airlines

Thu, Feb 26 - Tue, Mar 3

10:55 pm - 11:10 pm

HNL

IAD

19h 15m2 stops

7:30 am - 5:05 pm

IAD

HNL

14h 35m1 stop

$535Delta

Tue, Feb 24 - Wed, Mar 4

10:00 pm - 9:00 pm

HNL

DCA

17h 00m1 stop

8:59 am - 5:32 pm

DCA

HNL

14h 33m1 stop

$561Alaska Airlines

Tue, Apr 28 - Tue, May 5

10:40 pm - 9:00 pm

HNL

DCA

16h 20m1 stop

6:41 pm - 9:23 pm

DCA

HNL

32h 42m1 stop

$568Alaska Airlines

Thu, Mar 19 - Tue, Mar 24

7:50 pm - 12:37 pm

HNL

DCA

11h 47m1 stop

6:50 am - 3:00 pm

DCA

HNL

13h 10m1 stop

$575American Airlines

Wed, Feb 11 - Mon, Feb 16

11:30 pm - 9:26 pm

HNL

BWI

16h 56m2 stops

8:42 am - 5:42 pm

BWI

HNL

14h 00m1 stop

$635United Airlines

Tue, Jan 13 - Tue, Jan 20

Delta flights from Honolulu to Washington, D.C.

Our best Delta deals on Honolulu to Washington, D.C. flight tickets

Delta

Feb 4

HNL1:17 pmHonolulu

17h 35m

2 stops

IAD11:52 amWashington, D.C. Dulles Intl

Feb 8

IAD7:30 amWashington, D.C. Dulles Intl

14h 35m

1 stop

HNL5:05 pmHonolulu

$521

Find similar

Delta

Feb 24

HNL10:55 pmHonolulu

19h 15m

2 stops

IAD11:10 pmWashington, D.C. Dulles Intl

Mar 4

IAD7:30 amWashington, D.C. Dulles Intl

14h 35m

1 stop

HNL5:05 pmHonolulu

$535

Find similar

Delta

Feb 24

HNL10:55 pmHonolulu

19h 15m

2 stops

IAD11:10 pmWashington, D.C. Dulles Intl

Mar 4

IAD7:05 amWashington, D.C. Dulles Intl

19h 49m

2 stops

HNL9:54 pmHonolulu

$540

Find similar

American Airlines flights from Honolulu to Washington, D.C.

Our best American Airlines deals on Honolulu to Washington, D.C. flight tickets

American Airlines

Feb 11

HNL11:00 pmHonolulu

11h 59m

1 stop

DCA3:59 pmWashington, D.C. Reagan-National

Feb 16

DCA6:50 amWashington, D.C. Reagan-National

13h 10m

1 stop

HNL3:00 pmHonolulu

$575

Find similar

American Airlines

Feb 11

HNL7:00 pmHonolulu

12h 44m

1 stop

DCA12:44 pmWashington, D.C. Reagan-National

Feb 16

DCA11:57 amWashington, D.C. Reagan-National

14h 18m

2 stops

HNL9:15 pmHonolulu

$580

Find similar

American Airlines

Jan 19

HNL7:00 pmHonolulu

11h 00m

1 stop

DCA11:00 amWashington, D.C. Reagan-National

Jan 23

DCA7:00 amWashington, D.C. Reagan-National

13h 29m

1 stop

HNL3:29 pmHonolulu

$605

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Honolulu to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HonoluluWashington, D.C.

HNL - IAD

HNLIAD

Honolulu

Thu 1/29

8:00 am-4:26 pm

1 stop27h 26m

Washington, D.C. Dulles Intl

Mon 2/2

6:04 pm-10:08 pm

1 stop33h 04m

$515

HonoluluWashington, D.C.

HNL - DCA

HNLDCA

Honolulu

Thu 1/29

2:20 pm-9:59 pm

1 stop26h 39m

Washington, D.C. Reagan-National

Mon 2/2

5:01 pm-10:08 pm

1 stop34h 07m

$515

HonoluluWashington, D.C.

HNL - IAD

HNLIAD

Honolulu

Wed 2/4

1:17 pm-11:52 am

2 stops17h 35m

Washington, D.C. Dulles Intl

Sun 2/8

7:30 am-5:05 pm

1 stop14h 35m

$521

HonoluluWashington, D.C.

HNL - IAD

HNLIAD

Honolulu

Thu 2/26

9:45 pm-5:20 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Tue 3/3

7:05 am-10:30 pm

2 stops20h 25m

$533

HonoluluWashington, D.C.

HNL - IAD

HNLIAD

Honolulu

Thu 2/26

8:00 am-5:20 pm

1 stop28h 20m

Washington, D.C. Dulles Intl

Tue 3/3

7:05 am-11:13 am

1 stop33h 08m

$534

HonoluluWashington, D.C.

HNL - IAD

HNLIAD

Honolulu

Tue 2/24

10:55 pm-11:10 pm

2 stops19h 15m

Washington, D.C. Dulles Intl

Wed 3/4

7:30 am-5:05 pm

1 stop14h 35m

$535

HonoluluWashington, D.C.

HNL - DCA

HNLDCA

Honolulu

Tue 4/28

10:00 pm-9:00 pm

1 stop17h 00m

Washington, D.C. Reagan-National

Tue 5/5

8:59 am-5:32 pm

1 stop14h 33m

$561

HonoluluWashington, D.C.

HNL - DCA

HNLDCA

Honolulu

Thu 3/19

10:40 pm-9:00 pm

1 stop16h 20m

Washington, D.C. Reagan-National

Tue 3/24

6:41 pm-9:23 pm

1 stop32h 42m

$568

HonoluluWashington, D.C.

HNL - DCA

HNLDCA

Honolulu

Wed 2/11

7:50 pm-12:37 pm

1 stop11h 47m

Washington, D.C. Reagan-National

Mon 2/16

6:50 am-3:00 pm

1 stop13h 10m

$575

HonoluluBaltimore

HNL - BWI

HNLBWI

Honolulu

Tue 1/13

11:30 pm-9:26 pm

2 stops16h 56m

Baltimore/Washington

Tue 1/20

8:42 am-5:42 pm

1 stop14h 00m

$635

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Honolulu to Washington, D.C.

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

Prices

Airlines

Layovers

Other information

What is the cheapest month to fly to Washington, D.C.?

The month of October is, on average, the cheapest month to fly to Washington, D.C. from Honolulu, with most prices found around $579. If you’re not able to fly to Washington, D.C. in October, then February is your next best option. Flight prices from Honolulu to Washington, D.C. during February average around $620.

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from Honolulu is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $701. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Honolulu to Washington, D.C. for around $1,368.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the morning is the cheapest time of day to fly from Honolulu to Washington, D.C. when you can find flight prices for as low as $724. Flying to Washington, D.C. in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the afternoon because they tend to be around $1,022. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Honolulu to Washington, D.C. flight route?

Fly from Honolulu to Washington, D.C. Dulles Intl for the best Honolulu - Washington, D.C. flight prices

How far in advance should I book a flight to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from Honolulu when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $939 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Honolulu for as low as $660 on momondo.

What cabin class options are available on Honolulu to Washington, D.C. flights?

There are 4 cabin classes available to choose from on Honolulu to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Honolulu to Washington, D.C. flights?

You could potentially save up to 14% on your flight if you consider stops on a Honolulu to Washington, D.C. flight.

How have Honolulu to Washington, D.C. flight prices changed over time?

As of December 2025, prices for Honolulu to Washington, D.C. flights are approximately 26% cheaper when compared to flights at the same time last year.

When to book flights from Honolulu to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Honolulu to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Honolulu to Washington, D.C. (HNL to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Honolulu to Washington, D.C.

Best Price Found	$577
Fastest flight time	9h 16m
Direct flights	Every day
Airports in Washington, D.C.	2 airports

The best one-way flight to Washington, D.C. from Honolulu in the past 72 hours is $577. The best round-trip flight deal from Honolulu to Washington, D.C. found on momondo in the last 72 hours is $561.

The fastest flight from Honolulu to Washington, D.C. takes 9h 16m

Direct flights go from Honolulu to Washington, D.C. every day.

There are 2 airports in Washington, D.C.. From Honolulu there are direct flights to Washington, D.C. Dulles Intl (IAD).

Search flight deals

How far is Honolulu to Washington, D.C. by plane?
Washington, D.C. is 4825.6 mi away from Honolulu. A reasonable flight in good conditions will take 9h 16m.
When did momondo last update prices for flights from Honolulu Airport to Washington, D.C.?
Prices for flights from Honolulu Airport to Washington, D.C. were last updated today.
How many operators does momondo search for flights from Honolulu Airport to Washington, D.C.?
There are 6 operators available for flights from Honolulu Airport to Washington, D.C. as of December 2025.
How old do you have to be to fly from Honolulu Airport to Washington, D.C.?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Honolulu Airport to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The travel and health documents required for your trip to Washington, D.C. 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 license, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Honolulu to Washington, D.C.?
momondo data reveals that the most frequently booked plane model on the route from Honolulu to Washington, D.C. is Boeing 767-400, representing 50.00% of all bookings. The subsequent popular models are Airbus A330-200 at 29.17%, Boeing 787-9 Dreamliner at 8.33%, and Airbus A330 at 8.33%.
What is the most popular airline from Honolulu to Washington, D.C.?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Honolulu to Washington, D.C. is United Airlines (43% of total bookings). The next most popular airlines are Delta (22%), Alaska Airlines (14%), and American Airlines (11%).

Best airlines flying from Honolulu to Washington, D.C.

Compare and see reviews for airlines that fly from Honolulu to Washington, D.C. with momondo

Airline	Rating	Free Cancellation	Price
Hawaiian Airlines	PriceFrom $258	Free Cancellation	Rating 7.8 2,820 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $326	Free Cancellation	Rating 7.9 8,016 reviews	Search Delta flights
Southwest	PriceFrom $451	Free Cancellation	Rating 8.0 4,250 reviews	Search Southwest flights
American Airlines	PriceFrom $461	Free Cancellation	Rating 7.2 11,071 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $483	Free Cancellation	Rating 8.0 11,554 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $515	Free Cancellation	Rating 7.4 9,114 reviews	Search United Airlines flights

United Airlines Flights From Honolulu to Washington, D.C.
United Airlines flies from Honolulu to Washington, D.C. around 7 times per week, with 9,114 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Honolulu to Washington, D.C. in the last 72 hours was $515 (round-trip), much lower than the average airfare cost of $1,062 for United Airlines flights on this route.

Alexandria

National Harbor

Gettysburg

Arlington

Waldorf

Woodbridge

Tysons

Laurel

Colonial Beach

Silver Spring

Towson

Fredericksburg

Rockville

Gaithersburg

Manassas

Fairfax

Springfield

Glen Burnie

Reston

Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from Honolulu to Washington, D.C.?

It is quick and easy to find Honolulu to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from Honolulu to Washington, D.C. with flexible booking policies on momondo?

Flights from Honolulu to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Honolulu to Washington, D.C.?

Once you have performed a search for Honolulu to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Honolulu to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from Honolulu are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Washington, D.C. trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Tue 1/27

Tue 2/3

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Washington, D.C. Reagan-National Airport

Washington, D.C. Dulles Intl Airport

Popular cities in the United States

Flights to New Yorkfrom $50

Flights to Los Angelesfrom $47

Flights to Miamifrom $50

Flights to Chicagofrom $51

Flights to Orlandofrom $49

Flights to San Franciscofrom $59

Flights to Las Vegasfrom $49

Flights to Bostonfrom $51

Flights to Atlantafrom $44

Flights to Dallasfrom $51

Flights to Seattlefrom $57

Flights to Denverfrom $53

Cheap flights from Honolulu to Washington, D.C. from $215

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Honolulu to Washington, D.C. departing on 1/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Honolulu to Washington, D.C.

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Delta flights from Honolulu to Washington, D.C.

Our best Delta deals on Honolulu to Washington, D.C. flight tickets

American Airlines flights from Honolulu to Washington, D.C.

Our best American Airlines deals on Honolulu to Washington, D.C. flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Honolulu to Washington, D.C. that are best for you.

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Honolulu to Washington, D.C.

What is the cheapest month to fly to Washington, D.C.?

What is the cheapest day to depart on your flight to Washington, D.C.?

What is the cheapest time of day to depart on your flight to Washington, D.C.?

What is the cheapest Honolulu to Washington, D.C. flight route?

Fly from Honolulu to Washington, D.C. Dulles Intl for the best Honolulu - Washington, D.C. flight prices

How far in advance should I book a flight to Washington, D.C.?

What cabin class options are available on Honolulu to Washington, D.C. flights?

There are 4 cabin classes available to choose from on Honolulu to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Honolulu to Washington, D.C. flights?

You could potentially save up to 14% on your flight if you consider stops on a Honolulu to Washington, D.C. flight.

How have Honolulu to Washington, D.C. flight prices changed over time?

As of December 2025, prices for Honolulu to Washington, D.C. flights are approximately 26% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Honolulu to Washington, D.C.?

Delta, Alaska Airlines, and Southwest are the most popular carriers operating from Honolulu to Washington, D.C.

What airlines fly to Washington, D.C.?

Which airport is the most popular layover for flights between Honolulu and Washington, D.C.?

Seattle (SEA) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Honolulu to Washington, D.C.?

Flights via Detroit (DTW) offer the lowest average round-trip price of $670.

Which layover airport has the shortest travel time from Honolulu to Washington, D.C.?

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 11h 08m.

Which layover airport has the shortest connection time from Honolulu to Washington, D.C.?

Phoenix (PHX) has the shortest average layover time for this route: 1h 24m.

How many flights depart from Honolulu to Washington, D.C. on average per day?

The number of flights available between Honolulu and Washington, D.C. is 4 per day as of December 2025. The most frequent departure time is 5:00PM, with 100% of daily flights leaving in the afternoon.

How many flights depart from Honolulu to Washington, D.C. on average per week?

As of December 2025, 28 flights take off from Honolulu and land in Washington, D.C. each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.

When to book flights from Honolulu to Washington, D.C.

Cheap Honolulu to Washington, D.C. (HNL to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Honolulu to Washington, D.C.

Best Price Found

Fastest flight time

Direct flights

Airports in Washington, D.C.

How far is Honolulu to Washington, D.C. by plane?

When did momondo last update prices for flights from Honolulu Airport to Washington, D.C.?

How many operators does momondo search for flights from Honolulu Airport to Washington, D.C.?

How old do you have to be to fly from Honolulu Airport to Washington, D.C.?

What documentation or ID do you need to fly to Washington, D.C.?

What is the most popular plane model from Honolulu to Washington, D.C.?

What is the most popular airline from Honolulu to Washington, D.C.?

Best airlines flying from Honolulu to Washington, D.C.

Compare and see reviews for airlines that fly from Honolulu to Washington, D.C. with momondo

United Airlines Flights From Honolulu to Washington, D.C.

Traveling to a place near Washington, D.C.?

Why use momondo?

Why should I use momondo to find a flight deal from Honolulu to Washington, D.C.?

Can I find flights from Honolulu to Washington, D.C. with flexible booking policies on momondo?

How can momondo help me find flights from Honolulu to Washington, D.C.?

I’m not ready to book a flight from Honolulu to Washington, D.C. right now. Can momondo alert me if prices change?

An easier way to manage your Washington, D.C. trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.