BOS - IAD

$76 Find Cheap Flights from Boston to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Dulles Intl departing on 1/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Washington, D.C., as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$143
Typical prices: $190-$297
United Airlines
Wed 12/31Thu 1/8
BOS - IAD • Non-stop
Cheapest one-way
$76
Typical prices: $108-$214
Delta
Tue 1/6
BOS - IAD • 1 stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers extra legroom on this route.
Use the FlyLogan app for a smoother Boston departure.
Expert advice
Expert advice
Expert advice
Expert advice
Video guide: How to find cheap flights to Dulles Intl
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When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 25% price drop
May
Most popular
Good to know
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+1
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We hope you love your trip to Dulles Intl!
Flight Deals
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Flight Deals

Cheap Flights from Boston to Dulles Intl (BOS-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Dulles Intl 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.

Recent round-trip flight deals from Boston to Dulles Intl

Wed, Dec 31 - Thu, Jan 8
United Airlines Logo
9:30 am - 11:16 am
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
10:12 pm - 11:49 pm
IAD
-
BOS
1h 37mnonstop
$143United Airlines
Sun, Mar 1 - Thu, Mar 5
Frontier Logo
6:00 am - 4:32 pm
BOS
-
IAD
10h 32m1 stop
Frontier Logo
5:20 pm - 1:04 am
IAD
-
BOS
7h 44m1 stop
$145Frontier
Wed, Jan 7 - Mon, Jan 12
Multiple Airlines Logo
6:00 am - 4:50 pm
BOS
-
IAD
10h 50m1 stop
Multiple Airlines Logo
8:35 am - 2:38 pm
IAD
-
BOS
30h 03m1 stop
$147Multiple Airlines
Tue, Jan 6 - Tue, Jan 13
United Airlines Logo
5:20 am - 7:06 am
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
8:29 am - 1:13 pm
IAD
-
BOS
4h 44m1 stop
$149United Airlines
Thu, Jan 8 - Mon, Jan 12
Multiple Airlines Logo
3:43 pm - 7:55 am
BOS
-
IAD
16h 12m1 stop
Multiple Airlines Logo
4:22 pm - 1:19 am
IAD
-
BOS
8h 57m1 stop
$152Multiple Airlines
Tue, Jan 13 - Fri, Jan 16
United Airlines Logo
2:20 pm - 4:06 pm
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
10:12 pm - 11:49 pm
IAD
-
BOS
1h 37mnonstop
$153United Airlines
Thu, Jan 8 - Sat, Jan 10
United Airlines Logo
2:20 pm - 4:06 pm
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
5:20 pm - 6:57 pm
IAD
-
BOS
1h 37mnonstop
$155United Airlines
Sat, Jan 24 - Sat, Jan 24
United Airlines Logo
9:30 am - 11:16 am
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
10:12 pm - 11:49 pm
IAD
-
BOS
1h 37mnonstop
$157United Airlines
Sun, Feb 1 - Tue, Feb 3
United Airlines Logo
9:30 am - 11:16 am
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
12:40 pm - 2:17 pm
IAD
-
BOS
1h 37mnonstop
$158United Airlines
Tue, Jan 6 - Tue, Jan 13
United Airlines Logo
6:29 pm - 11:18 pm
BOS
-
IAD
4h 49m1 stop
United Airlines Logo
5:38 pm - 9:52 pm
IAD
-
BOS
4h 14m1 stop
$159United Airlines
Booking Insights

KAYAK's insights & trends for Boston to Dulles Intl flights

Get data-powered insights and trends into flights from Boston to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

Find cheap flights to Washington Dulles Airport
Find cheap flights to Washington Dulles Airport

Planning a trip from Boston to Dulles Intl? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

How much is a round-trip flight from Boston to Washington, D.C. Dulles Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to Washington, D.C. Dulles Intl Airport departing in December.

What’s the cheapest day of the week to fly from Boston to Washington Dulles Airport?

The average price of all round-trip flights from Boston to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

For Boston to Washington Dulles Airport, Friday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Washington Dulles Airport back to Boston, the best deals are generally found on Wednesday, with Sunday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Washington, D.C. Dulles Intl Airport is January, where tickets cost $209 (return) on average. On the other hand, the most expensive months are June and August, where the average cost of round-trip tickets is $336 and $312 respectively.

Can I save money by flying with a layover from Boston to Washington, D.C. Dulles Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $268 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to Washington, D.C. Dulles Intl Airport, you should book around 3 weeks before departure, which saves you about 41% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Expert advice

Expert advice for your flight from Boston to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Ethiopian Air

Ethiopian Airlines offers generous baggage allowances: two pieces up to 50 pounds each in Economy.


Upgrade to Cloud Nine for priority boarding and increased baggage allowance.

United Airlines

United offers Priority Boarding for Zone 2, reducing overhead bin space issues.


United's Economy Plus seats offer up to six inches more legroom than standard economy.

Airports
BOS

Consider using the FlyLogan app for gate info, flight status, and ordering ahead at airport restaurants, enhancing your departure experience from BOS.

IAD

The Silver Line Metro now connects IAD to downtown D.C., offering a convenient 50-minute ride to the city center.

Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on Ethiopian Air

Jessica Macdonald

Jessica Macdonald

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and IAD

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Blane Bachelor

Blane Bachelor

Expert on BOS

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more

Good to know

Low seasonFebruary
Cheapest flight$76
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Boston to Washington Dulles Airport

When to book flights from Boston to Dulles Intl

Are your dates flexible? Find out the best times to travel from Boston to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Boston to Washington Dulles Airport flights

  • Where should I park my car if I drive to BOS?

    BOS is home to several parking garages. It is also surrounded by several off-site garages. If you want to park your car at a parking garage near this airport, you should consider parking it in one of its off-site garages. This is because off-site garages charge lower rates than on-site ones.

  • Apart from IAD, which other airports serve Washington?

    Washington is served by IAD, Ronald Reagan Washington National Airport (DCA), and Baltimore/Washington International Airport (BWI). If you don’t want to land at IAD, you should opt to land at DCA, as it is closer to Washington and its surroundings than BWI.

  • Is there an on-site hotel at IAD?

    If you would like to stay at a hotel near IAD, you can do so, as this Washington airport is home to Sleepbox Lounge. Found between Gates A6 and A14, near the AeroTrain in Concourse A, this hotel features elite amenities. This hotel’s rooms are relatively cheaper than most hotels near the airport, so staying in it would be economically wise.

  • Is it possible to rent a car at IAD?

    IAD is home to car rental agencies like Avis, Budget, Dollar, Enterprise, Hertz, and National. The counters for these car rentals are within the airport’s terminal complex. Given that all these car rentals are reliable, if you want to rent a car at IAD, you’ll have many agencies to hire from.

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

    In the last 3 days, the lowest price for a flight from Boston to Washington, D.C. Dulles Intl Airport was $76 for a one-way ticket and $143 for a round-trip.

  • Do I need a passport to fly between Boston and Washington Dulles Airport?

    A passport is not required to fly from Boston to Washington Dulles Airport.

  • Which airlines offer Wi-Fi service onboard planes from Boston to Washington Dulles Airport?

    JetBlue, Delta, American Airlines, Air France, and Aeromexico offer inflight Wi-Fi service on the Boston to Washington Dulles Airport flight route.

  • Which aircraft models fly most regularly from Boston to Washington Dulles Airport?

    The Boeing 737-900 is the aircraft model that flies most regularly on the Boston to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Boston to Washington Dulles Airport?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Boston and Washington Dulles Airport, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Boston to Washington Dulles Airport?

    There are nonstop flights from Boston to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from Boston to Washington, D.C., Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Boston to Washington, D.C. are Delta and United Airlines. With an average price for the route of $267 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $278 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Boston to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Boston with another airline. Booking your flights between Boston and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Boston to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $160 or less one-way and $311 or less round-trip.
  • Boston Logan International Airport (BOS) is one of the most used airports globally. As a result, you’ll likely encounter slow-moving traffic and long lines at its security checkpoints when entering this airport. To have enough time to navigate the traffic and be cleared at the checkpoints, you should reach this airport no less than 2h before your flight on the date you're set to fly from it.
  • If you are journeying from BOS to Dulles International Airport (IAD) with your kids, you should let them have fun in one of BOS’s children’s play areas. These playgrounds are near Gate 18 in Terminal A, Gate 30 in Terminal B, and Gate 25 in Terminal C. It’s worth stating that in any, your kids will have a good time, as they all feature several toys and child-proof playgrounds.
  • In case you’re traveling to Washington with your pet while waiting for your flight at BOS, you can let it relieve itself in one of the airport’s designated pet relief areas. The relief areas at this airport are on the Arrival level curb of every terminal and across Gate E7 in Terminal E.
  • If you’re in no rush to depart IAD, you should consider visiting Be Relax Spa. This spa, located near Gate A32, has dedicated staff and proper spa equipment. As it offers its services at pocket-friendly rates, you will enjoy quality service without incurring a hefty bill here.
  • You can pray, meditate, or reflect privately at IAD, as the airport features a chapel. This interfaith chapel, near Gate A32 on Concourse A, is normally open 24/7.

Prefer to fly direct from Boston to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Boston Logan Intl to Washington, D.C. Dulles Intl.
Find which airlines fly direct from Boston Logan Intl Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

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

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

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

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 4 airlines serving from Boston to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Boston to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8010 reviews
8.1Boarding
7.9Entertainment
8.5Crew
7.9Comfort
7.3Food
Airline reviews

The food is terrible. The staff is wonderful. Comfort is good.

10.0 ExcellentRonda, Dec 2025
JAX - JFK
Read more Delta reviews

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

It was probably one of the worst flights I’ve been on. The restrooms were never cleaned or stocked. The food was very subpar, and i usually enjoy airline food, so I was disappointed. It was just all around a bad experience. The only saving grace was the flight attendants.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Great crew, excellent landing, good food. Over all great experience. Thank you!

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Crew was dismissive. Snacks and refills not offered. Poor business class experience. Bed not comfortable compared to Emirates or BA.

Flight was delayed for 5 hours because crew didn’t have enough time to rest - this seems like it could have been avoided with better scheduling. Food was not good.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

The ride share experience in JFK is terrible. After traveling on a flight, then you need to take a subway to the last stop to get an uber or lyft. Unacceptable. Bad job JetBlue for permitting JFK and Port Authority to do this to your passengers.

Checking In on JetBlue site was impossible. It hung up on REAL ID. Even my Global Entry did not help. Luckily, on Kayak site it was a breeze. Entire flight the temperature was COLD! Otherwise the crew was great!

The flight was two hours late due to a computer fault and resulting maintenance. Nothing was offered as compensation beyond bottles of water during the time we were deplaned and waiting in the terminal.

Very pleasant flight attendants. Gate crew rather loud chatting with each other.

Four plus hour flight delay in New York caused us to take off after 11:30pm. We didn’t arrive at our hotel until five hours after check in. Started the trip off feeling exhausted.

Plane was in bad shape. TV’s and WiFi didn’t work. Plane need a refresh. Not enough room for bags.

Everything was great. I liked the text updates so that I never miss a gate change & I have all the latest info.

I don’t usually fly budget airlines or airlines in the United States. It was as good as any other airline. The seats are comfortable and the airline attendants are not rude & surly. Very nice flight (s).

They have the most inexperienced / rude flight staff I’ve encountered

very difficult boarding process - aggressive passengers not the friendliest crew

Everything was smoothly and convenient! Just stay in this way!

Cancelled my flight and the earliest that they are willing give me for the next flight which was 3 days later on a weekday. Only accommodation they are willing to give was $30 airline credit that will expire in 1 year

Terrible Airline I will never fly that airline again. Shame on you for recommending them.

Flight was canceled, huge lines to get baggage returned. Most other airlines had delays but not widespread cancellations like Spirit.

I didn't eat, so I can't rate the food. Delayed set off was beyond

No free snacks or drinks. Freezing. Uncomfortable. No plugs or entertainment. If you fly to LA the make you change terminals with a slow bus. Awful trip that took forever. Terrible airline- maybe the worst I’ve ever flown.

I hope you continue to be one of the great company

Crew are always very angry and dismissive like they seem they are being forced to work. In addition, there was a long line for the bathrooms, and only one was allowed to be used. No reason was given for only one bathroom being available; apparently, the stewardess was more interested in using the jumpseat instead of allowing the customers to use the bathroom.

Very positive in both directions. Safe travels, nice staff, lost and found in fact found my phone under my chair! I was out of cash after my NYC trip otherwise I would've offered a reward for helping my day out immensly! Thanks you so much Spirit staff!

I stopped flying spirit as much because they are crooks and thieves. It's not like other airlines where you can at least get credits they just take your money.

Everything you need to know for your flight from Boston to Dulles Intl

Information on your arrival and departure airports