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

$84 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Allegiant Air and Frontier, with prices starting from $85 and $98, respectively.

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.

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).

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

On average you can expect to pay $1,586 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $116 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at $137.

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

Before booking your flight to Washington, D.C. Dulles Intl Airport from Boston, check out the most reliable airlines to get you to your destination on time: Egyptair (100%), Republic Airways (100%), Ethiopian Air( 98%).

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

The most popular airlines flying from Boston to Washington, D.C. Dulles Intl Airport are JetBlue, Delta and Spirit Airlines. Something to consider prior to booking your flight.

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

Leaving on a Thursday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 67% on the overall cost on flights from Boston to Washington, D.C. Dulles Intl Airport.

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

January is one of the best times of the year to fly to Washington, D.C. Dulles Intl Airport from Boston. Prices for January average $188 per person but you can even find prices for as low as $66. The most expensive prices can be found in the month of November. Opting for a January flight can save you 18% on your journey compared to booking in November

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

If you book a flight to Washington, D.C. Dulles Intl from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 17 flights from Logan Intl to Washington, D.C. Dulles Intl per day from 4 different airlines.

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

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

How can I find direct flights from Boston to Dulles Intl?

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

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

Yes. Cheapflights offers flight deals from Boston 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.

$84+ Flights from Boston to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from Boston Logan Intl to Washington, D.C. Dulles Intl are usually found in January or August, booked 51 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Boston to Dulles Intl

Round-trip from	$144 (United Airlines)
One-way from	$84 (United Airlines)
Popular in	June
Cheapest in	January
Average price	$278
Good round-trip deal	$359 or less
Good one-way deal	$174 or less

From Boston Logan Intl to Washington, D.C. Dulles Intl

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One-way flight from Boston Logan Intl to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($15 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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

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

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Find flight deals from Boston to Dulles Intl

Cheapest flights from Boston to Dulles Intl
Explore the most affordable flight options available from Boston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.

mar. 8/55:30 amBOS - IAD

Nonstop1h 34mUnited Airlines

sáb. 8/910:18 pmIAD - BOS

Nonstop1h 41mUnited Airlines

Deal found 7/1

$144

jue. 7/106:00 amBOS - IAD

1 stop11h 16mFrontier

dom. 7/136:06 pmIAD - BOS

1 stop6h 32mFrontier

Deal found 7/3

$166

jue. 8/711:31 amBOS - IAD

1 stop8h 49mMultiple Airlines

dom. 8/1011:58 amIAD - BOS

2 stops21h 00mMultiple Airlines

Deal found 7/2

$193

jue. 7/3111:31 amBOS - IAD

1 stop8h 49mAllegiant Air

dom. 8/39:05 pmIAD - BOS

1 stop13h 47mAllegiant Air

Deal found 7/2

$205

Best flights from Boston to Dulles Intl
Discover carefully curated flight deals from Boston to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 3, 2025.

mar. 8/55:30 amBOS - IAD

Nonstop1h 34mUnited Airlines

sáb. 8/910:18 pmIAD - BOS

Nonstop1h 41mUnited Airlines

Deal found 7/1

$144

lun. 7/146:00 amBOS - IAD

1 stop11h 17mFrontier

jue. 7/176:06 pmIAD - BOS

1 stop6h 32mFrontier

Deal found 7/3

$146

vie. 9/58:59 amBOS - IAD

1 stop6h 54mAllegiant Air

lun. 9/89:34 pmIAD - BOS

1 stop12h 09mAllegiant Air

Deal found 7/3

$179

jue. 8/711:31 amBOS - IAD

1 stop8h 49mMultiple Airlines

dom. 8/1011:58 amIAD - BOS

2 stops21h 00mMultiple Airlines

Deal found 7/3

$193

Last-minute flights from Boston to Dulles Intl
Discover last-minute flight deals from Boston to Dulles Intl. Data last updated julio 3, 2025 and is based on user searches.

jue. 7/106:00 amBOS - IAD

1 stop11h 16mFrontier

dom. 7/136:06 pmIAD - BOS

1 stop6h 32mFrontier

Deal found 7/3

$166

vie. 7/115:30 amBOS - IAD

Nonstop1h 34mUnited Airlines

mié. 8/610:18 pmIAD - BOS

Nonstop1h 41mUnited Airlines

Deal found 7/1

$208

vie. 7/116:05 amBOS - IAD

1 stop5h 57mDelta

mié. 8/65:23 pmIAD - BOS

1 stop6h 30mDelta

Deal found 7/1

$273

dom. 7/1311:31 amBOS - IAD

1 stop8h 49mAllegiant Air

lun. 7/213:13 pmIAD - BOS

1 stop18h 02mAllegiant Air

Deal found 7/2

$204

dom. 7/1311:31 amBOS - IAD

1 stop8h 49mMultiple Airlines

mié. 7/1612:55 pmIAD - BOS

3 stops20h 03mMultiple Airlines

Deal found 7/2

$209

jue. 7/3111:31 amBOS - IAD

1 stop8h 49mAllegiant Air

dom. 8/39:05 pmIAD - BOS

1 stop13h 47mAllegiant Air

Deal found 7/2

$205

mar. 8/55:30 amBOS - IAD

Nonstop1h 34mUnited Airlines

sáb. 8/910:18 pmIAD - BOS

Nonstop1h 41mUnited Airlines

Deal found 7/1

$144

jue. 8/711:31 amBOS - IAD

1 stop8h 49mMultiple Airlines

dom. 8/1011:58 amIAD - BOS

2 stops21h 00mMultiple Airlines

Deal found 7/2

$193

One-way flights from Boston to Dulles Intl
Search for one-way flight options from Boston to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated julio 3, 2025.

lun. 10/65:30 amBOS - IAD

Nonstop1h 41mUnited Airlines

Deal found 7/2

$84

jue. 7/1011:31 amBOS - IAD

1 stop8h 49mAllegiant Air

Deal found 7/1

$85

sáb. 7/266:00 amBOS - IAD

1 stop11h 17mFrontier

Deal found 7/3

$98

sáb. 8/164:38 pmBOS - IAD

2 stops17h 36mMultiple Airlines

Deal found 7/2

$117

lun. 8/46:05 amBOS - IAD

1 stop5h 57mDelta

Deal found 7/3

$124

lun. 9/156:30 amBOS - IAD

1 stop5h 48mAmerican Airlines

Deal found 7/2

$127

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

mar. 8/5

5:30 am-7:04 am

Nonstop1h 34m

Washington, D.C. Dulles Intl

sáb. 8/9

10:18 pm-11:59 pm

Nonstop1h 41m

$144

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

jue. 7/24

6:00 am-5:16 pm

1 stop11h 16m

Washington, D.C. Dulles Intl

lun. 7/28

6:07 pm-12:38 am

1 stop6h 31m

$166

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

jue. 8/7

11:31 am-8:20 pm

1 stop8h 49m

Washington, D.C. Dulles Intl

dom. 8/10

11:58 am-8:58 am

2 stops21h 00m

$193

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

jue. 7/31

11:31 am-8:20 pm

1 stop8h 49m

Washington, D.C. Dulles Intl

dom. 8/3

9:05 pm-10:52 am

1 stop13h 47m

$205

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

lun. 10/6

5:30 am-7:11 am

Nonstop1h 41m

$84

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

jue. 7/10

11:31 am-8:20 pm

1 stop8h 49m

$85

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

sáb. 7/26

6:00 am-5:17 pm

1 stop11h 17m

$98

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

sáb. 7/26

6:15 am-8:53 pm

2 stops14h 38m

$117

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

lun. 8/4

6:05 am-12:02 pm

1 stop5h 57m

$124

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

lun. 9/15

6:30 am-12:18 pm

1 stop5h 48m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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

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

Airlines

Ethiopian Air

Economy Class offers 32-inch pitch and personal entertainment monitors on most aircraft.

Cloud 9 passengers enjoy real Champagne and Ethiopian dishes like doro wot.

Read more about Ethiopian Airby Paul Rubio

United Airlines

Basic Economy restricts carry-ons; only personal items allowed unless exceptions apply.

Economy Plus offers extra legroom and priority seating for MileagePlus Premier members.

Read more about United Airlinesby Harriet Baskas

Airports

BOS

Use the FlyLogan App to pre-order meals and save time at BOS. Most eateries participate, making it a convenient option.

IAD

Take the Washington Metro Silver Line to reach downtown from IAD in under 40 minutes. It's a cost-effective option.

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 Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl 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. Dulles Intl Airport

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

The price you pay for your flight from Boston to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 51 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Boston to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). 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 IAD?

When flying from Boston to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 21% versus a flight at noon.

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

Travelers seeking maximum savings on their Boston to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Tuesday mornings 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. Dulles Intl Airport

The most flights from BOS to IAD are scheduled on a Monday (20 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (15 on average).

How much does it cost to fly round-trip from Boston to Washington, D.C. Dulles Intl Airport?

Reviews of airlines servicing Dulles Intl

Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Boston to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,970 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,845 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Allegiant Air

7.2

Good

709 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.9

Fair

3,284 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What airport do you fly from for flights from Boston to Washington, D.C. Dulles Intl?
If you book a flight to Washington, D.C. Dulles Intl from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 17 flights from Logan Intl to Washington, D.C. Dulles Intl per day from 4 different airlines.
What are the cheapest airlines flying from Boston to Washington, D.C. Dulles Intl Airport round-trip?
According to our current data, United Airlines ($144), Frontier ($146), and Allegiant Air ($179) offers the cheapest pricing from Boston to Washington, D.C. Dulles Intl Airport. Users have found that United Airlines is 47% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Boston to Washington, D.C. Dulles Intl Airport one-way?
$84 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Allegiant Air and Frontier, with prices starting from $85 and $98, respectively.
What are the most reliable airlines from Boston to Washington, D.C. Dulles Intl Airport?
Before booking your flight to Washington, D.C. Dulles Intl Airport from Boston, check out the most reliable airlines to get you to your destination on time: Egyptair (100%), Republic Airways (100%), Ethiopian Air( 98%).
What are the cheapest flights from Boston to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay $1,586 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $116 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at $137.
Can I find deals for flights from Boston to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Boston to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Boston to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Dulles Intl.
Can I find deals for business class flights from Boston to Dulles Intl?
Yes. Cheapflights offers flight deals from Boston 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 Boston to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Boston to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). 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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Fredericksburg

Linthicum Heights

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Fairfax

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National Harbor

Manassas

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Top 4 airlines flying from Boston to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$51	Average$95	FlexibilityNo cancel fee	On-time65%
JetBlue	Cheapest$73	Average$281	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$108	Average$222	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$153	Average$279	FlexibilityNo cancel fee	On-time69%

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$84+ Cheap flights from Boston (BOS) 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Boston to Dulles Intl 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. Dulles Intl are usually found in January or August, booked 51 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Boston to Dulles Intl

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 Dulles Intl

Cheapest flights from Boston to Dulles IntlExplore the most affordable flight options available from Boston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.

Explore the most affordable flight options available from Boston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.

Cheapflights Fare Finder

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

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

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

Airlines

Ethiopian Air

United Airlines

Airports

BOS

IAD

Our travel experts

Best time to book a flight from Boston to Dulles Intl

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Boston to Dulles Intl. Price data was last updated on June 27, 2025.

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

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

Find hourly flight availability from Boston to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 3, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Boston to Dulles Intl. Price data was last updated on June 29, 2025.

Weekly flight availability from Boston to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Boston to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated julio 3, 2025.

How much does it cost to fly round-trip from Boston to Washington, D.C. Dulles Intl Airport?

Reviews of airlines servicing Dulles Intl

Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Boston to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines 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 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 Boston to Washington, D.C. Dulles Intl?

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

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

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

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

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

How can I find direct flights from Boston to Dulles Intl?

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

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

Traveling to a place near Boston?

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Alternative routes for Boston to Dulles Intl

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Top 4 airlines flying from Boston to Dulles Intl

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Cheapest flights from Boston to Dulles Intl
Explore the most affordable flight options available from Boston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.