BOS - IAD

$84 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 2/24. 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
$160
Overall average: $277
Frontier
Tue 4/7Thu 4/9
BOS - IAD • 1 stop
Cheapest non-stop
$167
Typical prices: $193-$342
United Airlines
Thu 2/26Tue 3/3
BOS - IAD • Non-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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Top airlines
Frontier
Cheapest • from $160 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 39% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 15% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Flight Deals
Booking Insights
Expert advice
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

Tue, Apr 7 - Thu, Apr 9
Frontier Logo
12:42 pm - 12:36 am
BOS
-
IAD
11h 54m
1 stop
Frontier Logo
5:34 pm - 1:26 am
IAD
-
BOS
7h 52m
1 stop
$160Frontier
Tue, Mar 3 - Wed, Mar 11
United Airlines Logo
10:30 am - 4:29 pm
BOS
-
IAD
5h 59m
1 stop
United Airlines Logo
6:00 am - 9:21 am
IAD
-
BOS
3h 21m
1 stop
$165United Airlines
Fri, Feb 27 - Wed, Mar 4
United Airlines Logo
5:35 am - 7:19 am
BOS
-
IAD
1h 44mnonstop
United Airlines Logo
8:36 am - 12:53 pm
IAD
-
BOS
4h 17m
1 stop
$166United Airlines
Thu, Feb 26 - Tue, Mar 3
United Airlines Logo
5:35 am - 7:19 am
BOS
-
IAD
1h 44mnonstop
United Airlines Logo
12:36 pm - 2:12 pm
IAD
-
BOS
1h 36mnonstop
$167United Airlines
Fri, Feb 20 - Mon, Feb 23
Multiple Airlines Logo
6:00 am - 5:13 pm
BOS
-
IAD
11h 13m
1 stop
Multiple Airlines Logo
7:05 pm - 1:13 am
IAD
-
BOS
30h 08m
2 stops
$170Multiple Airlines
Wed, Mar 11 - Fri, Mar 13
United Airlines Logo
5:45 am - 7:29 am
BOS
-
IAD
1h 44mnonstop
United Airlines Logo
6:00 am - 9:21 am
IAD
-
BOS
3h 21m
1 stop
$172United Airlines
Wed, Feb 25 - Thu, Feb 26
United Airlines Logo
2:20 pm - 4:04 pm
BOS
-
IAD
1h 44mnonstop
United Airlines Logo
8:36 am - 12:53 pm
IAD
-
BOS
4h 17m
1 stop
$173United Airlines
Fri, Feb 20 - Mon, Feb 23
Frontier Logo
6:00 am - 5:13 pm
BOS
-
IAD
11h 13m
1 stop
Frontier Logo
7:05 pm - 1:13 am
IAD
-
BOS
30h 08m
2 stops
$174Frontier
Tue, Mar 10 - Fri, Mar 20
United Airlines Logo
10:30 am - 4:25 pm
BOS
-
IAD
5h 55m
1 stop
United Airlines Logo
6:00 am - 9:21 am
IAD
-
BOS
3h 21m
1 stop
$176United Airlines
Thu, Feb 26 - Fri, Feb 27
United Airlines Logo
9:30 am - 11:14 am
BOS
-
IAD
1h 44mnonstop
United Airlines Logo
8:36 am - 12:53 pm
IAD
-
BOS
4h 17m
1 stop
$177United 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.

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 February, where tickets cost $238 (return) on average. On the other hand, the most expensive months are June and August, where the average cost of round-trip tickets is $337 and $314 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 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 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.
Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on Ethiopian Air

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.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and IAD

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.

Blane Bachelor

Blane Bachelor

Expert on BOS

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.

Good to know

Low seasonFebruary
Cheapest flight$84
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly and prices are also 4% 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 $84 for a one-way ticket and $160 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, and American Airlines 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 $246 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 $281 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 $140 or less one-way and $306 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 8128 reviews
7.2Food
7.9Comfort
8.5Crew
7.8Entertainment
8.1Boarding
Airline reviews

I was given middle seat on this flight and prior Boston to Seoul flight That is a problem for long flights, Kayak system did not give me a change to select my seats and assigned me middle seats regardless of my elevated status in Delta. This needs immediate attention.

2.0 MediocreAlparda, Feb 2026
BOS - ICN
Read more Delta reviews

I was given middle seat on this flight and prior Boston to Seoul flight That is a problem for long flights, Kayak system did not give me a change to select my seats and assigned me middle seats regardless of my elevated status in Delta. This needs immediate attention.

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Great other than a couple very drunk guys that for a while kept bumping my seat from behind. The staff did their best to control them. Even refused serving them alcohol and allowed the gal sitting next to them to move.

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

The seats were comfortable and we had leg room. Great entertainment.

The flight crew where really good. Better then the crew from BNE to SFO

Safe made to destination. Late to start at GVA for icy reasons but we fought our next fly.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

l really enjoy very much the flight was very pleasant

The flight was delayed for 1:30 hours for maintenance issues. They should give more information about connecting flights. For a Business Cabin the Crew was mediocre.

Friendly crew, efficient boarding and flight arrived early. Couldn’t ask for a better experience

Terrible. They canceled our early morning flight after midnight on the day of and had no available flights to rebook my family on for the next 72 hours. Yet they still had other flights that were not cancelled from JFK so it couldn’t be based on the weather. It felt like they canceled the flight based on it not being profitable enough for them. I am not interested in traveling with the again. The absolute worse customer service and lack of accountability.

Horribly rude check in at airport, worst in 25 years of flying. All over a simple issue they could have googled to resolve.

First time flying with JetBlue and never again. I went to the counter to request meet and assist because I'm 74 and my wife is 79. I walk with a cane and my wife is handicapped and has her own wheel chair. I told the agent that my wife and luggage was at the entrance door. The ticketing agent said to me that they don't offer meet and assist. I need to bring them our luggage and then go back and get my wife in order to get my boarding pass. As I went back to get my luggage a Southwest agent along with a TSA agent recognized the situation and came over and took my wife and luggage to the JetBlue ticketing counter alongside the line and told the JetBlue agent to issue to take our luggage as soon as they could.

1) No pilot available for 1 hour 2) no room for most passengers careyon in overhead—-> stowed below 3) when we landed we had to wait 45 min. Before docking at gate as gate was not ready

It was good. I prefer JB over other airlines.I just wish we had headphones for the films, but other than that - good.

Qatar Airways only had spicy meals on the menu in economy class. You might want to get food in the airport before boarding.

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.

Spirit has always and will always stink. Absolute worst airline around.

It was smooth sailing snags we had a really smooth landing and a great flight!

The entire experience was so surprisingly pleasant. And the blocked extra seat between us was such an amazing and nice bonus. Great experience all around and I can’t wait to fly with spirit again!

Everything was OK, the deicing took a long time, our connections were almost missed.

All very good except they didn’t load our walker so haven’t gotten it yet

Flight was cancelled. But kayak thought it was still on time.

For the cost you can't e too critical, but the inablitiy to recline the seat and minimal cushioning in the seats made for a less than comfortable flight. Other than that we had an ealry departure and arrival, boarding was smooth.

The flight was delayed by 2 hours and we had no food or water or chargers

Spirit was on time. They maintained updates and information. The crew was friendly and professional. Because this is a budget friendly airline, they have dispensed with a lot of frills and part of that comes with a price, for example, the seats are not quite as comfortable as others. I am ok with a pay for beverage and snack service as I prefer my own anyway so this was not a concern. I thought overall, having a great flight crew and on time service was definitely worth losing some of the frills from other carriers.

Nothing everything cost money a bottle of water is 5 dollars and there wasn't even an outlet to plug 🔌 in my 📱 phone

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

Information on your arrival and departure airports