IAD - BOI

$147 Find Cheap Flights from Washington Dulles Airport to Boise - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Boise departing on 8/17. 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

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Everything you should know

Cheapest round-trip
$293
Typical prices: $371-$558
Delta
Thu 8/20Mon 8/24
IAD - BOI • 1 stop
Cheapest one-way
$147
Typical prices: $146-$384
Delta
Mon 8/17
IAD - BOI • 1 stop
Top airlines
Cheapest • from $293 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Boise. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $205 (round-trip)
Shortest trip • 7h 04m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 40% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Boise!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Boise (IAD-BOI)

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

Thu, Aug 20 - Mon, Aug 24
Delta Logo
6:49 pm - 11:59 pm
IAD
-
BOI
7h 10m
1 stop
Delta Logo
11:10 pm - 9:20 am
BOI
-
IAD
8h 10m
1 stop
$293Delta
Sat, Sep 19 - Sat, Sep 26
United Airlines Logo
6:15 am - 11:26 am
IAD
-
BOI
7h 11m
1 stop
United Airlines Logo
2:35 pm - 1:13 am
BOI
-
IAD
8h 38m
1 stop
$306United Airlines
Sun, Sep 6 - Sat, Sep 19
United Airlines Logo
8:35 am - 3:31 pm
IAD
-
BOI
8h 56m
1 stop
United Airlines Logo
12:28 pm - 9:20 pm
BOI
-
IAD
6h 52m
1 stop
$308United Airlines
Wed, Sep 9 - Tue, Sep 22
Alaska Airlines Logo
9:03 am - 3:24 pm
IAD
-
BOI
8h 21m
1 stop
Alaska Airlines Logo
2:16 pm - 11:59 pm
BOI
-
IAD
7h 43m
1 stop
$309Alaska Airlines
Thu, Sep 17 - Tue, Sep 22
Delta Logo
3:15 pm - 10:00 pm
IAD
-
BOI
8h 45m
1 stop
Delta Logo
10:34 am - 10:56 pm
BOI
-
IAD
10h 22m
1 stop
$313Delta
Thu, Aug 27 - Sun, Aug 30
Delta Logo
7:10 am - 3:18 pm
IAD
-
BOI
10h 08m
1 stop
Delta Logo
11:10 pm - 9:20 am
BOI
-
IAD
8h 10m
1 stop
$317Delta
Thu, Sep 17 - Tue, Sep 22
Alaska Airlines Logo
7:47 pm - 2:02 pm
IAD
-
BOI
20h 15m
1 stop
Alaska Airlines Logo
1:15 pm - 11:59 pm
BOI
-
IAD
8h 44m
1 stop
$325Alaska Airlines
Thu, Sep 17 - Thu, Sep 17
Alaska Airlines Logo
7:00 am - 3:30 pm
IAD
-
BOI
10h 30m
1 stop
Alaska Airlines Logo
5:52 pm - 5:40 am
BOI
-
IAD
9h 48m
1 stop
$328Alaska Airlines
Thu, Aug 20 - Sat, Aug 22
American Airlines Logo
6:09 am - 11:16 am
IAD
-
BOI
7h 07m
1 stop
American Airlines Logo
6:44 am - 6:27 pm
BOI
-
IAD
9h 43m
1 stop
$330American Airlines
Thu, Sep 10 - Mon, Sep 14
Alaska Airlines Logo
7:00 am - 3:30 pm
IAD
-
BOI
10h 30m
1 stop
Alaska Airlines Logo
5:52 pm - 5:40 am
BOI
-
IAD
9h 48m
1 stop
$334Alaska Airlines
Booking Insights

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Boise, 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 Washington, D.C. Dulles Intl Airport to Boise is November, where tickets cost $308 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is $817 and $684 respectively.

Good to know

Low season

November

Cheapest flight

$147
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Washington Dulles Airport to Boise

When to book flights from Dulles Intl to Boise

Are your dates flexible? Find out the best times to travel from Dulles Intl to Boise 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 Washington Dulles Airport to Boise flights

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

    In the last 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Boise was $147 for a one-way ticket and $293 for a round-trip.

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

    No, a passport isn't needed to fly from Washington Dulles Airport to Boise. However, local authorities might ask for an official ID.

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

    We unfortunately don’t have that data for this specific route.

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

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

  • Which is the best airline for flights from Washington, D.C. to Boise, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Boise are Southwest and Delta. With an average price for the route of $532 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $330 and an overall rating of 7.8.

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

    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 Washington Dulles Airport to Boise.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boise from Washington Dulles Airport 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 Washington Dulles Airport to Boise?

    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 Boise with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and BOI 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 Washington Dulles Airport to Boise?

    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 Boise from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Dulles Intl to Boise

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Boise. 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 Dulles Intl to Boise? 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.
8.0
SouthwestOverall score based on 4242 reviews
8.6Crew
8.1Boarding
8.0Comfort
7.0Food
7.5Entertainment
Airline reviews

It was good. Last flight was delayed but I always say that is in God's plan

8.0 ExcellentCarla, Jul 2026
LAS - RDU
Read more Southwest reviews

It was good. Last flight was delayed but I always say that is in God's plan

Red eye from San Diego. Temperature of the cabin was way too warm and the air duct flowed very little air.

Overall good, just screaming kids in the area the whole flight.

My experience will Southwest was good. I wish there was more entertainment and the boarding process was slow at time but other than that my experience was great definitely will be flying with SouthWest again.

Flight was delayed by 2 hours, meaning that a flight to Dwnver which should have arrived at 11pm came into the airport at 1 am. Made for a very long day.

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

No delays and arrived to destination 30 min early. Staff was super friendly.

Pretty standard flight. We left late, but arrived early. The wifi entertainment is always nice. The free snacks and beverages are simple, but appreciated. I'm tall and the seats are an issue. I can deal with a short flight, but any longer, I have to find another airline where I know beforehand I have extra legroom.

Awesome experience. No in-flight video or meal. Still do not like the boarding process.

On time, good crew, easy flight. Just like the old days!

I missed the flight because the Minneapolis flight was 49 minutes LATE, and the Boise flight LEFT 24 minutes EARLY!

The gentleman at the gate I think his name is RIE was exceptional

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

Having to up charge for a seat assignment is not good. Delta can do better

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

I wouldn't say I liked being forced to check my small roller bag at the gate; too many people had bags and were in a higher boarding group.

715PM departure was 2.5 hours late. Received hotel & food voucher but after we already booked a room. Entire team just seemed like they were 2-3 steps behind in execution, and notifcations.

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

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

Information on your arrival and departure airports