IAD - BOI

$132 Find Cheap Flights from Washington Dulles Airport to Boise

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 9/16. 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 Boise

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

Cheapest round-trip
$263
Typical prices: $475-$270
Delta
Thu 8/20Mon 8/24
IAD - BOI • 1 stop
Cheapest one-way
$132
Typical prices: $274-$421
American Airlines
Wed 9/16
IAD - BOI • 1 stop
Top airlines
Cheapest • from $263 (round-trip)
Best reviews • 7.9 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 09m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 34% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
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
7:10 am - 3:18 pm
IAD
-
BOI
10h 08m
1 stop
Delta Logo
11:35 pm - 9:19 am
BOI
-
IAD
7h 44m
1 stop
$263Delta
Sat, Sep 19 - Sat, Sep 26
American Airlines Logo
6:24 am - 2:02 pm
IAD
-
BOI
9h 38m
1 stop
American Airlines Logo
6:44 am - 5:54 pm
BOI
-
IAD
9h 10m
1 stop
$270American Airlines
Mon, Jun 29 - Fri, Jul 3
Delta Logo
7:00 am - 3:12 pm
IAD
-
BOI
10h 12m
1 stop
Delta Logo
11:45 pm - 10:22 am
BOI
-
IAD
8h 37m
1 stop
$278Delta
Sat, Sep 19 - Sat, Sep 26
American Airlines Logo
6:24 am - 2:02 pm
IAD
-
BOI
9h 38m
1 stop
American Airlines Logo
1:18 pm - 11:51 pm
BOI
-
IAD
8h 33m
2 stops
$282American Airlines
Wed, Aug 26 - Tue, Sep 1
American Airlines Logo
2:53 pm - 10:20 pm
IAD
-
BOI
9h 27m
1 stop
American Airlines Logo
6:44 am - 6:27 pm
BOI
-
IAD
9h 43m
1 stop
$286American Airlines
Wed, Aug 26 - Tue, Sep 1
American Airlines Logo
2:53 pm - 10:20 pm
IAD
-
BOI
9h 27m
1 stop
American Airlines Logo
6:44 am - 6:27 pm
BOI
-
IAD
9h 43m
1 stop
$288American Airlines
Sat, Jul 4 - Tue, Jul 21
United Airlines Logo
3:56 pm - 9:29 pm
IAD
-
BOI
7h 33m
1 stop
United Airlines Logo
7:05 pm - 5:53 am
BOI
-
IAD
8h 48m
1 stop
$289United Airlines
Tue, Jul 14 - Wed, Jul 29
Delta Logo
6:00 am - 10:57 am
IAD
-
BOI
6h 57m
1 stop
Delta Logo
2:04 pm - 12:41 am
BOI
-
IAD
8h 37m
1 stop
$293Delta
Mon, Aug 31 - Fri, Sep 4
Delta Logo
4:00 pm - 10:32 pm
IAD
-
BOI
8h 32m
1 stop
Delta Logo
1:43 pm - 12:10 am
BOI
-
IAD
8h 27m
1 stop
$297Delta
Wed, Aug 26 - Wed, Sep 2
Alaska Airlines Logo
7:00 am - 3:31 pm
IAD
-
BOI
10h 31m
1 stop
Alaska Airlines Logo
7:20 am - 6:14 pm
BOI
-
IAD
8h 54m
1 stop
$298Alaska 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.

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

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

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 $669 respectively.

Good to know

Low seasonNovember
Cheapest flight$132
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly and prices are also 14% 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 7 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Boise was $132 for a one-way ticket and $263 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, Delta or Southwest?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Boise are Delta and Southwest. With an average price for the route of $330 and an overall rating of 7.9, Delta is the most popular choice. Southwest is also a great choice for the route, with an average price of $504 and an overall rating of 7.9.

  • 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.
7.9
SouthwestOverall score based on 4270 reviews
8.0Comfort
7.5Entertainment
8.1Boarding
7.0Food
8.6Crew
Airline reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

4.0 OkayAnonymous, May 2026
MDW - LAX
Read more Southwest reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

The flight was smooth. The Southwest experience has degraded overall, but this one was okay.

No gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

I'm glad it wasn't only 75% full because I could get a good seat

if I was good. Not happy that I have to pay extra money to get the seat I need for lake room, but I guess that’s a sign of the times.

Seats were very comfortable. They tilted back. Drinks and snacks were free and served 3 times. Attendants were awesome.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

Planes were clean, no water or snacks on either flight.

Free & relatively fast Wi-Fi. Would've liked a wider drink selection.

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

Was revoked with Jet Blue due to delay from Kenya Air

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

WiFi didn’t work on two of four planes. Flight attendants were not overly friendly or welcoming. Planes were extremely slow to board and deplane.

Delta does a great job with entertainment and free wifi. I can still be in touch with my colleagues while in the air.

Aside from a completely packed plane, I really have no complaints.

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

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.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

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

Information on your arrival and departure airports