Is United Airlines the cheapest airline to fly with from Boston to Washington, D.C.?

With an average price of $250 return, United Airlines is not the cheapest airline to fly from Boston to Washington, D.C. with. Instead, for the lowest price, our data suggests flying with Spirit Airlines, where a return flight costs $150 on average.

What is the cheapest United Airlines flight from Boston to Washington, D.C.?

In the last 3 days, the lowest price for a flight with United Airlines from Boston to Washington, D.C. was $131 for a return flight and $72 for a one-way flight.

Does United Airlines fly direct to Washington, D.C. from Boston?

Yes, United Airlines does offer direct flights for the route, with around 6 flights per week.

What’s the cheapest day of the week to fly from Boston to Washington, D.C. with United Airlines?

On average, the cheapest day of the week to fly from Boston to Washington, D.C. with United Airlines is Tuesday, when prices are around $73. The most expensive day is generally Sunday, where the average price is around $107.

What’s the cheapest month to fly from Boston to Washington, D.C. with United Airlines?

The cheapest month for United Airlines flights to Washington, D.C. from Boston is generally January, where plane tickets cost $108 on average. If possible, try to avoid the most expensive months of August and July, where tickets cost $238 and $288 respectively.

$74 Cheap United Airlines Flights from Boston to Washington, D.C.

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Flight Deals

Cheap United Airlines Flight Deals from Boston to Washington, D.C.

Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from Boston to Washington, D.C. that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip United Airlines flight deals from Boston to Washington, D.C.

Wed, Jan 14 - Tue, Jan 20

2:20 pm - 4:06 pm

BOS

IAD

1h 46mnonstop

12:40 pm - 2:17 pm

IAD

BOS

1h 37mnonstop

$147United Airlines

Wed, Jan 14 - Wed, Jan 21

9:30 am - 11:16 am

BOS

IAD

1h 46mnonstop

12:40 pm - 2:17 pm

IAD

BOS

1h 37mnonstop

$157United Airlines

Sat, Jan 10 - Thu, Jan 15

7:22 pm - 9:08 pm

BOS

IAD

1h 46mnonstop

12:40 pm - 2:17 pm

IAD

BOS

1h 37mnonstop

$162United Airlines

Fri, Jan 16 - Mon, Jan 19

9:30 am - 11:16 am

BOS

IAD

1h 46mnonstop

9:00 am - 10:36 am

IAD

BOS

1h 36mnonstop

$167United Airlines

Wed, Jan 14 - Wed, Jan 21

10:30 am - 2:39 pm

BOS

DCA

4h 09m1 stop

12:59 pm - 6:32 pm

DCA

BOS

5h 33m1 stop

$167United Airlines

Sat, Jan 10 - Thu, Jan 15

7:21 pm - 11:13 pm

BOS

IAD

3h 52m1 stop

9:00 am - 10:36 am

IAD

BOS

1h 36mnonstop

$172United Airlines

Fri, Jan 16 - Fri, Jan 23

2:20 pm - 4:06 pm

BOS

IAD

1h 46mnonstop

6:00 am - 11:07 am

IAD

BOS

5h 07m1 stop

$177United Airlines

Fri, Jan 9 - Wed, Jan 14

10:30 am - 4:34 pm

BOS

DCA

6h 04m1 stop

12:59 pm - 5:14 pm

DCA

BOS

4h 15m1 stop

$177United Airlines

Sat, Jan 3 - Sat, Jan 10

5:20 am - 7:06 am

BOS

IAD

1h 46mnonstop

10:12 pm - 11:49 pm

IAD

BOS

1h 37mnonstop

$181United Airlines

Sat, Jan 10 - Sun, Jan 11

4:05 pm - 9:22 pm

BOS

IAD

5h 17m1 stop

6:00 am - 11:11 am

IAD

BOS

5h 11m1 stop

$182United Airlines

Useful Info

Low season	August
High season	April
Cheapest flight	$74
Average price round-trip	$559
Good deal round-trip	$475

Best time to beat the crowds with an average 8% drop in price.

Most popular time to fly and prices are also 3% lower on average.

Flight from Boston to Washington Dulles Airport

(avg. price over the last 2 weeks)

or less

When to Book Flights with United Airlines from Boston to Washington, D.C.

Average price per month

Flight prices as travel date approaches

Is United Airlines the cheapest airline to fly with from Boston to Washington, D.C.?
With an average price of $250 return, United Airlines is not the cheapest airline to fly from Boston to Washington, D.C. with. Instead, for the lowest price, our data suggests flying with Spirit Airlines, where a return flight costs $150 on average.
What is the cheapest United Airlines flight from Boston to Washington, D.C.?
In the last 3 days, the lowest price for a flight with United Airlines from Boston to Washington, D.C. was $131 for a return flight and $72 for a one-way flight.
Does United Airlines fly direct to Washington, D.C. from Boston?
Yes, United Airlines does offer direct flights for the route, with around 6 flights per week.
What’s the cheapest day of the week to fly from Boston to Washington, D.C. with United Airlines?
On average, the cheapest day of the week to fly from Boston to Washington, D.C. with United Airlines is Tuesday, when prices are around $73. The most expensive day is generally Sunday, where the average price is around $107.
What’s the cheapest month to fly from Boston to Washington, D.C. with United Airlines?
The cheapest month for United Airlines flights to Washington, D.C. from Boston is generally January, where plane tickets cost $108 on average. If possible, try to avoid the most expensive months of August and July, where tickets cost $238 and $288 respectively.

7.4

Good9,092 verified ratings

7.3Comfort

6.6Food

7.7Boarding

7.1Entertainment

8.1Crew

Pros +

Flight was quick and easy. (in 2447 reviews)

Show reviews that mention

2.0 Poor

Sally, Dec 2025

LGA

DEN

It was 11 hours DELAYED BOARDED AND RE BOARDED 3 times

10.0 Wonderful

Roger, Dec 2025

CAE

ORD

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

6.0 Okay

Sue, Dec 2025

SJO

SFO

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

10.0 Wonderful

Bill, Dec 2025

LHR

IAH

Staff on board was excellent. Positive upbeat helpful- like it used to be.

8.0 Very good

Eurico Hiromitsu, Dec 2025

ORD

GRU

Razoavel

8.0 Very good

Eurico Hiromitsu, Dec 2025

HND

ORD

Razoavel

10.0 Wonderful

Michele, Dec 2025

RSW

ORD

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

4.0 Mediocre

David, Dec 2025

AUA

EWR

For an expensive flight to another country, United has a lot of nerve serving pretzels and no meals (unless, of course, you want to buy something to eat). Unacceptable.

8.0 Very good

Steven, Dec 2025

SAN

DEN

The seats are not comfortable and cramped

10.0 Wonderful

Verified traveler, Dec 2025

MCI

IAH

It was great. No change

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

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United Airlines flights

Other airlines flying from Boston to Washington, D.C.

Spirit Airlines flights from Boston to Washington, D.C.

Delta flights from Boston to Washington, D.C.

JetBlue flights from Boston to Washington, D.C.

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

BOS - WAS

$74 Find Cheap United Airlines Flights from Boston to Washington, D.C.

Search hundreds of travel sites at once for deals on United Airlines flights from Boston to Washington, D.C.

Cheap United Airlines Flight Deals from Boston to Washington, D.C.

Recent round-trip United Airlines flight deals from Boston to Washington, D.C.

Recent one-way United Airlines flight deals from Boston to Washington, D.C.

Recent last minute United Airlines flight deals from Boston to Washington, D.C.

Recent direct United Airlines flight deals from Boston to Washington, D.C.

Good to know

When to Book Flights with United Airlines from Boston to Washington, D.C.

FAQs for flying to Washington, D.C. with United Airlines

Is United Airlines the cheapest airline to fly with from Boston to Washington, D.C.?

With an average price of $250 return, United Airlines is not the cheapest airline to fly from Boston to Washington, D.C. with. Instead, for the lowest price, our data suggests flying with Spirit Airlines, where a return flight costs $150 on average.

What is the cheapest United Airlines flight from Boston to Washington, D.C.?

In the last 3 days, the lowest price for a flight with United Airlines from Boston to Washington, D.C. was $131 for a return flight and $72 for a one-way flight.

Does United Airlines fly direct to Washington, D.C. from Boston?

Yes, United Airlines does offer direct flights for the route, with around 6 flights per week.

What’s the cheapest day of the week to fly from Boston to Washington, D.C. with United Airlines?

On average, the cheapest day of the week to fly from Boston to Washington, D.C. with United Airlines is Tuesday, when prices are around $73. The most expensive day is generally Sunday, where the average price is around $107.

What’s the cheapest month to fly from Boston to Washington, D.C. with United Airlines?

The cheapest month for United Airlines flights to Washington, D.C. from Boston is generally January, where plane tickets cost $108 on average. If possible, try to avoid the most expensive months of August and July, where tickets cost $238 and $288 respectively.

United Airlines Customer Reviews

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

Other airlines flying from Boston to Washington, D.C.

Flights from the other most popular airlines that fly from Boston to Washington, D.C. according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

Cabin class types available on flights to Washington, D.C.

Cabin classes available on flights to Boston. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Complete your trip to Washington, D.C. with a hotel stay or car rental

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The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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Top United Airlines flights

The most popular destinations for flights with United Airlines according to clicks from KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.