What are the cheapest airlines flying from Boston to Washington, D.C. round-trip?

Spirit Airlines, at $73, was found to be the cheapest airline from Boston to Washington, D.C..Alternate airlines to your destination round-trip include United Airlines and American Airlines. Spirit Airlines is 61% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from Boston to Washington, D.C. one-way?

One-way options have recently been found by users for as low as $53 on Spirit Airlines. Other airlines that offer cheap prices include Delta from $81 and United Airlines from $86 one-way.

In terms of precipitation, rainfall in Washington, D.C. 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. when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C., 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).

What are the most popular routes from Boston to Washington, D.C.?

The most popular flight routes from Boston to Washington, D.C. are Boston Logan Intl - Baltimore/Washington, Boston Logan Intl - Washington, D.C. Reagan-National and Boston Logan Intl - Washington, D.C. Dulles Intl.

What are the cheapest flights from Boston to Washington, D.C.?

On average you can expect to pay $1,202 for a flight from Boston to Washington, D.C.. The cheapest flight overall is $122 while the most popular route, (Boston Logan Intl - Baltimore/Washington) is currently priced at $73.

What are the most reliable airlines from Boston to Washington, D.C.?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to Washington, D.C. on time: Egyptair (100%), Republic Airways (100%), Ethiopian Air (98%).

What are the most popular airlines that fly from Boston to Washington, D.C.?

Consider JetBlue, Delta or Spirit Airlines when booking your flight. These represent the most popular airlines when flying from Boston to Washington, D.C..

What is the cheapest day to fly round-trip from Boston to Washington, D.C.?

Flights from Boston to Washington, D.C. are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C..

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

Travelers have found it’s best to book a flight 36 days in advance to save up to 81% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 36 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Boston to Washington, D.C. 1-2 weeks in advance for as low as $177, or $333 for flights within the next 24 hours.

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

Flights from Boston to Washington, D.C. lean towards being more expensive in November. Prices are generally better when you fly from Boston to Washington, D.C. in January, with the cheapest ticket starting at $66.

What airport do you fly from for flights from Boston to Washington, D.C.?

Boston Logan Intl (BOS) is the airport you will fly out of if you book a flight from Boston to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Logan Intl; the airport handles an average of 64 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Boston airport to Washington, D.C.. It is only a 2.6 mi journey to Logan Intl (BOS) from Boston’s city center.

Can I find deals for flights from Boston to Washington, D.C. that include hotel bookings?

Yes. In addition to deals on Boston to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Boston to Washington, D.C.?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Washington, D.C..

Can I find deals for business class flights from Boston to Washington, D.C.?

Yes. Cheapflights offers flight deals from Boston to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$51+ Flights from Boston to Washington, D.C.

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Boston to Washington, D.C. with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Boston Logan Intl to Washington, D.C. are usually found in January or August, booked 68 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from Boston to Washington, D.C.

Round-trip from	$73 (Cheapflightsfares)
One-way from	$53 (FlightHub)
Popular in	November
Cheapest in	January
Average price	$192
Good round-trip deal	$135 or less
Good one-way deal	$104 or less

From Boston Logan Intl to Washington, D.C. (WAS)

Search Deals

One-way flight from Boston Logan Intl to Washington, D.C. (WAS)

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($11 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Price to beat on a round-trip flight from Boston Logan Intl to Washington, D.C. (WAS).

Search Deals

Price to beat on a one-way flight from Boston Logan Intl to Washington, D.C. (WAS).

Search Deals

Find flight deals from Boston to Washington, D.C.

Cheapest flights from Boston to Washington, D.C.
Explore the most affordable flight options available from Boston to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 16, 2025.

Tue 8/56:00 amBOS - BWI

Nonstop1h 30mSpirit Airlines

Tue 8/127:10 amBWI - BOS

Nonstop1h 27mSpirit Airlines

Deal found 7/14

$73

Sat 8/301:00 pmBOS - IAD

Nonstop1h 43mUnited Airlines

Mon 9/110:18 pmIAD - BOS

Nonstop1h 39mUnited Airlines

Deal found 7/14

$144

Sat 8/306:00 amBOS - DCA

Nonstop1h 49mAmerican Airlines

Mon 9/18:27 amDCA - BOS

Nonstop1h 53mAmerican Airlines

Deal found 7/14

$144

Thu 8/289:22 amBOS - DCA

Nonstop1h 37mJetBlue

Thu 9/411:55 amDCA - BOS

Nonstop1h 33mJetBlue

Deal found 7/14

$149

Thu 8/76:05 amBOS - DCA

Nonstop1h 55mDelta

Thu 8/146:00 amDCA - BOS

Nonstop1h 42mDelta

Deal found 7/15

$161

Tue 8/59:40 amBOS - DCA

1 stop5h 42mUnited Airlines

Wed 8/69:05 amDCA - BOS

1 stop4h 35mUnited Airlines

Deal found 7/15

$181

Thu 7/3111:31 amBOS - IAD

1 stop8h 49mMultiple Airlines

Mon 8/45:40 pmIAD - BOS

3 stops25h 54mMultiple Airlines

Deal found 7/15

$185

Thu 7/176:00 amBOS - IAD

1 stop11h 16mFrontier

Fri 7/186:07 pmIAD - BOS

1 stop6h 31mFrontier

Deal found 7/14

$210

Fri 10/38:58 amBOS - IAD

1 stop6h 51mAllegiant Air

Sun 10/58:13 pmIAD - BOS

1 stop13h 13mAllegiant Air

Deal found 7/14

$216

Best flights from Boston to Washington, D.C.
Discover carefully curated flight deals from Boston to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 16, 2025.

Tue 8/56:00 amBOS - BWI

Nonstop1h 30mSpirit Airlines

Tue 8/127:10 amBWI - BOS

Nonstop1h 27mSpirit Airlines

Deal found 7/14

$73

Sat 8/301:00 pmBOS - IAD

Nonstop1h 43mUnited Airlines

Mon 9/110:18 pmIAD - BOS

Nonstop1h 39mUnited Airlines

Deal found 7/14

$144

Sat 8/306:00 amBOS - DCA

Nonstop1h 49mAmerican Airlines

Mon 9/18:27 amDCA - BOS

Nonstop1h 53mAmerican Airlines

Deal found 7/14

$144

Thu 8/2811:15 amBOS - DCA

Nonstop1h 43mJetBlue

Thu 9/46:57 pmDCA - BOS

Nonstop1h 35mJetBlue

Deal found 7/14

$149

Thu 8/76:05 amBOS - DCA

Nonstop1h 55mDelta

Thu 8/146:00 amDCA - BOS

Nonstop1h 42mDelta

Deal found 7/15

$161

Thu 7/3111:31 amBOS - IAD

1 stop8h 49mMultiple Airlines

Mon 8/45:40 pmIAD - BOS

3 stops25h 54mMultiple Airlines

Deal found 7/15

$185

Fri 10/38:58 amBOS - IAD

1 stop6h 51mAllegiant Air

Sun 10/58:13 pmIAD - BOS

1 stop13h 13mAllegiant Air

Deal found 7/14

$216

Tue 8/59:40 amBOS - DCA

1 stop5h 42mUnited Airlines

Wed 8/69:05 amDCA - BOS

1 stop4h 35mUnited Airlines

Deal found 7/15

$181

Last-minute flights from Boston to Washington, D.C.
Discover last-minute flight deals from Boston to Washington, D.C.. Data last updated July 16, 2025 and is based on user searches.

Thu 7/176:00 amBOS - IAD

1 stop11h 16mFrontier

Sat 7/196:07 pmIAD - BOS

1 stop6h 32mFrontier

Deal found 7/14

$210

Tue 7/226:15 amBOS - BWI

1 stop11h 17mSpirit Airlines

Thu 7/317:10 amBWI - BOS

Nonstop1h 27mSpirit Airlines

Deal found 7/15

$147

Tue 7/2211:15 amBOS - DCA

Nonstop1h 39mJetBlue

Tue 7/223:45 pmDCA - BOS

Nonstop1h 35mJetBlue

Deal found 7/15

$162

Tue 7/228:25 pmBOS - DCA

Nonstop1h 57mDelta

Thu 7/316:00 amDCA - BOS

Nonstop1h 42mDelta

Deal found 7/15

$197

Tue 7/228:00 amBOS - BWI

1 stop14h 49mMultiple Airlines

Tue 7/297:10 amBWI - BOS

Nonstop1h 27mMultiple Airlines

Deal found 7/14

$205

Tue 7/226:05 amBOS - IAD

1 stop5h 57mDelta

Tue 8/55:23 pmIAD - BOS

1 stop6h 30mDelta

Deal found 7/15

$247

Tue 7/222:49 pmBOS - IAD

1 stop4h 47mAmerican Airlines

Tue 8/51:06 pmIAD - BOS

1 stop6h 19mAmerican Airlines

Deal found 7/14

$276

Thu 7/245:30 amBOS - IAD

Nonstop1h 34mUnited Airlines

Sun 7/2710:18 pmIAD - BOS

Nonstop1h 41mUnited Airlines

Deal found 7/15

$167

Thu 7/246:05 amBOS - DCA

1 stop4h 22mUnited Airlines

Sun 7/279:05 amDCA - BOS

1 stop4h 35mUnited Airlines

Deal found 7/15

$202

Thu 7/2411:31 amBOS - IAD

1 stop8h 49mMultiple Airlines

Mon 7/285:40 pmIAD - BOS

3 stops25h 54mMultiple Airlines

Deal found 7/14

$223

Thu 7/246:00 amBOS - IAD

1 stop11h 16mFrontier

Mon 7/286:07 pmIAD - BOS

1 stop6h 31mFrontier

Deal found 7/14

$271

Fri 7/257:00 amBOS - DCA

Nonstop2h 07mAmerican Airlines

Sun 7/276:45 amDCA - BOS

Nonstop1h 35mAmerican Airlines

Deal found 7/14

$168

One-way flights from Boston to Washington, D.C.
Search for one-way flight options from Boston to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated July 16, 2025.

Wed 8/66:00 amBOS - BWI

Nonstop1h 30mSpirit Airlines

Deal found 7/14

$53

Wed 8/138:59 pmBOS - BWI

Nonstop1h 49mDelta

Deal found 7/15

$81

Sat 8/306:00 amBOS - DCA

1 stop4h 28mUnited Airlines

Deal found 7/14

$86

Thu 7/2411:31 amBOS - IAD

1 stop8h 49mAllegiant Air

Deal found 7/15

$87

Mon 8/251:20 pmBOS - DCA

Nonstop1h 48mJetBlue

Deal found 7/13

$87

Fri 8/157:30 amBOS - BWI

Nonstop1h 35mSouthwest

Deal found 7/15

$87

Fri 9/59:30 amBOS - IAD

Nonstop1h 43mUnited Airlines

Deal found 7/14

$90

Fri 8/89:59 pmBOS - DCA

Nonstop1h 54mDelta

Deal found 7/15

$90

Mon 8/183:55 pmBOS - BWI

1 stop4h 25mAmerican Airlines

Deal found 7/16

$91

Thu 10/911:25 amBOS - BWI

1 stop7h 05mFrontier

Deal found 7/14

$93

Mon 8/255:00 amBOS - DCA

1 stop6h 00mSouthwest

Deal found 7/15

$99

Sat 8/3012:53 pmBOS - IAD

1 stop7h 55mFrontier

Deal found 7/13

$101

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BostonBaltimore

BOS - BWI

BOSBWI

Boston Logan Intl

Tue 8/5

6:00 am-7:30 am

Nonstop1h 30m

Baltimore/Washington

Tue 8/12

7:10 am-8:37 am

Nonstop1h 27m

$73

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 8/30

1:00 pm-2:43 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Mon 9/1

10:18 pm-11:57 pm

Nonstop1h 39m

$144

BostonWashington, D.C.

BOS - DCA

BOSDCA

Boston Logan Intl

Sat 8/30

6:00 am-7:49 am

Nonstop1h 49m

Washington, D.C. Reagan-National

Mon 9/1

8:27 am-10:20 am

Nonstop1h 53m

$144

BostonWashington, D.C.

BOS - DCA

BOSDCA

Boston Logan Intl

Thu 8/28

8:00 am-9:45 am

Nonstop1h 45m

Washington, D.C. Reagan-National

Thu 9/4

10:00 am-11:35 am

Nonstop1h 35m

$149

BostonWashington, D.C.

BOS - DCA

BOSDCA

Boston Logan Intl

Thu 8/7

6:05 am-8:00 am

Nonstop1h 55m

Washington, D.C. Reagan-National

Thu 8/14

6:00 am-7:42 am

Nonstop1h 42m

$161

BostonWashington, D.C.

BOS - DCA

BOSDCA

Boston Logan Intl

Tue 8/5

9:40 am-3:22 pm

1 stop5h 42m

Washington, D.C. Reagan-National

Tue 8/12

9:05 am-1:43 pm

1 stop4h 38m

$181

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 7/31

11:31 am-8:20 pm

1 stop8h 49m

Washington, D.C. Dulles Intl

Mon 8/4

5:40 pm-7:34 pm

3 stops25h 54m

$185

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 10/3

8:58 am-3:49 pm

1 stop6h 51m

Washington, D.C. Dulles Intl

Sun 10/5

8:13 pm-9:26 am

1 stop13h 13m

$216

BostonBaltimore

BOS - BWI

BOSBWI

Boston Logan Intl

Tue 10/21

6:00 am-7:33 am

Nonstop1h 33m

$51

BostonBaltimore

BOS - BWI

BOSBWI

Boston Logan Intl

Wed 8/13

8:59 pm-10:48 pm

Nonstop1h 49m

$81

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/15

Showing 1-10 of 23 results

The best insider tips for Boston to Washington, D.C. flights

Cheapflights partnered with top experts to bring you the best recommendations for your Boston to Washington, D.C. trip

Airlines

Ethiopian Air

Ethiopian Airlines offers generous award availability in premium cabins via Star Alliance partners.

Ethiopian Airlines' Economy Class features a 32-inch pitch and personal entertainment monitors.

Read more about Ethiopian Airby Paul Rubio

United Airlines

United Airlines' Economy Plus offers extra legroom seats towards the front of the cabin.

United's Basic Economy allows a personal item only; no carry-on bags are permitted.

Read more about United Airlinesby Harriet Baskas

Airports

BOS

Use the FlyLogan App to pre-order meals at BOS, saving time before your flight. Most eateries participate in this convenient service.

IAD

The Washington Metro Silver Line offers a cost-effective way to reach downtown from IAD in under 40 minutes, with a station five minutes from the terminal.

Our travel experts

Paul Rubio

Expert on Ethiopian Air and BOS

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on IAD

Best time to book a flight from Boston to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Boston 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 Boston to Washington, D.C.

How far ahead should I book a flight from Boston to Washington, D.C.?

The best time to book flights from Boston to Washington, D.C. is 68 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Boston to Washington, D.C.?

Currently, August is the cheapest month in which you can book a flight from Boston to Washington, D.C. (average of $309). Flying from Boston to Washington, D.C. in April is currently the most expensive (average of $337). 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 time of day to fly from BOS to WAS?

One of the essential ways to save on airfare from Boston to Washington, D.C. is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 20% on airfare.

What is the cheapest day to fly from Boston to Washington, D.C.?

Travelers seeking maximum savings on their Boston to Washington, D.C. flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Boston to Washington, D.C.

The most flights from BOS to WAS are scheduled on a Monday (81 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with Southwest, Delta, and United Airlines from Boston to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,241 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,957 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,863 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

JetBlue

7.3

Good

2,908 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

What airport do you fly from for flights from Boston to Washington, D.C.?
Boston Logan Intl (BOS) is the airport you will fly out of if you book a flight from Boston to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Logan Intl; the airport handles an average of 64 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Boston airport to Washington, D.C.. It is only a 2.6 mi journey to Logan Intl (BOS) from Boston’s city center.
What are the cheapest airlines flying from Boston to Washington, D.C. round-trip?
Spirit Airlines, at $73, was found to be the cheapest airline from Boston to Washington, D.C..Alternate airlines to your destination round-trip include United Airlines and American Airlines. Spirit Airlines is 61% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Boston to Washington, D.C. one-way?
One-way options have recently been found by users for as low as $53 on Spirit Airlines. Other airlines that offer cheap prices include Delta from $81 and United Airlines from $86 one-way.
What are the most popular routes from Boston to Washington, D.C.?
The most popular flight routes from Boston to Washington, D.C. are Boston Logan Intl - Baltimore/Washington, Boston Logan Intl - Washington, D.C. Reagan-National and Boston Logan Intl - Washington, D.C. Dulles Intl.
What are the most reliable airlines from Boston to Washington, D.C.?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to Washington, D.C. on time: Egyptair (100%), Republic Airways (100%), Ethiopian Air (98%).
What are the cheapest flights from Boston to Washington, D.C.?
On average you can expect to pay $1,202 for a flight from Boston to Washington, D.C.. The cheapest flight overall is $122 while the most popular route, (Boston Logan Intl - Baltimore/Washington) is currently priced at $73.
Can I find deals for flights from Boston to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Boston to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Boston to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Washington, D.C..
Can I find deals for business class flights from Boston to Washington, D.C.?
Yes. Cheapflights offers flight deals from Boston to Washington, D.C. 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 Boston to Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from Boston to Washington, D.C. (average of $309). Flying from Boston to Washington, D.C. in April is currently the most expensive (average of $337). 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

Woodbridge

Arlington

Alexandria

Tysons

Silver Spring

Fredericksburg

Gaithersburg

Easton

Fairfax

Towson

Linthicum Heights

Falls Church

Waldorf

Laurel

Rockville

Oxon Hill

Springfield

National Harbor

Manassas

Dundalk

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Boston to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$49	Average$116	FlexibilityNo cancel fee	On-time65%
JetBlue	Cheapest$60	Average$257	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$108	Average$235	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$140	Average$245	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$147	Average$265	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$172	Average$270	FlexibilityNo cancel fee	On-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$51+ Cheap flights from Boston (BOS) to Washington, D.C. (WAS)

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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Boston to Washington, D.C. with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Boston Logan Intl to Washington, D.C. are usually found in January or August, booked 68 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from Boston to Washington, D.C.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Boston to Washington, D.C.

Cheapest flights from Boston to Washington, D.C.Explore the most affordable flight options available from Boston to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 16, 2025.

Explore the most affordable flight options available from Boston to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 16, 2025.

Cheapflights Fare Finder

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

The best insider tips for Boston to Washington, D.C. flights

Cheapflights partnered with top experts to bring you the best recommendations for your Boston to Washington, D.C. trip

Airlines

Ethiopian Air

United Airlines

Airports

BOS

IAD

Our travel experts

Best time to book a flight from Boston to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Boston with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Boston to Washington, D.C.

How far ahead should I book a flight from Boston to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Washington, D.C.. Price data was last updated on July 11, 2025.

What is the cheapest month to book a flight from Boston to Washington, D.C.?

What is the cheapest time of day to fly from BOS to WAS?

Find hourly flight availability from Boston to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 16, 2025.

What is the cheapest day to fly from Boston to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Boston to Washington, D.C.. Price data was last updated on July 13, 2025.

Weekly flight availability from Boston to Washington, D.C.

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with Southwest, Delta, and United Airlines from Boston to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Boston to Washington, D.C.. 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 Boston to Washington, D.C.?

What are the cheapest airlines flying from Boston to Washington, D.C. round-trip?

What are the cheapest airlines to fly from Boston to Washington, D.C. one-way?

What are the most popular routes from Boston to Washington, D.C.?

What are the most reliable airlines from Boston to Washington, D.C.?

What are the cheapest flights from Boston to Washington, D.C.?

Can I find deals for flights from Boston to Washington, D.C. that include hotel bookings?

How can I find direct flights from Boston to Washington, D.C.?

Can I find deals for business class flights from Boston to Washington, D.C.?

What is the cheapest month to book a flight from Boston to Washington, D.C.?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Boston to Washington, D.C.

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Boston to Washington, D.C.
Explore the most affordable flight options available from Boston to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 16, 2025.