IAD - BIL

$176 Find Cheap Flights from Washington Dulles Airport to Billings

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 Billings departing on 7/21. 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 Billings

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

Cheapest round-trip
$351
Typical prices: $843-$491
Alaska Airlines
Wed 8/26Tue 9/1
IAD - BIL • 1 stop
Cheapest one-way
$176
Delta
Tue 7/21
IAD - BIL • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $351 (round-trip)
United Airlines
Best reviews • 7.4 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 Billings. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Chicago (ORD)
Cheapest • Avg $618 (round-trip)
Chicago (ORD)
Shortest trip • 6h 44m (one-way)
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 100% price drop
June
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 Billings!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Billings (IAD-BIL)

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

Wed, Aug 26 - Tue, Sep 1
Alaska Airlines Logo
9:00 am - 6:40 pm
IAD
-
BIL
11h 40m
1 stop
Alaska Airlines Logo
7:20 pm - 5:40 am
BIL
-
IAD
8h 20m
1 stop
$351Alaska Airlines
Sat, Aug 29 - Wed, Sep 9
Delta Logo
2:23 pm - 8:12 pm
IAD
-
BIL
7h 49m
1 stop
Delta Logo
6:25 pm - 9:10 am
BIL
-
IAD
12h 45m
2 stops
$356Delta
Wed, Aug 26 - Mon, Aug 31
Delta Logo
6:56 pm - 11:13 pm
IAD
-
BIL
6h 17m
1 stop
Delta Logo
6:25 pm - 9:10 am
BIL
-
IAD
12h 45m
2 stops
$360Delta
Sat, Aug 29 - Wed, Sep 9
Delta Logo
12:29 pm - 10:36 pm
IAD
-
BIL
12h 07m
2 stops
Delta Logo
6:25 pm - 9:10 am
BIL
-
IAD
12h 45m
2 stops
$361Delta
Fri, Aug 14 - Tue, Aug 25
Delta Logo
6:56 pm - 11:13 pm
IAD
-
BIL
6h 17m
1 stop
Delta Logo
6:34 pm - 9:19 am
BIL
-
IAD
12h 45m
2 stops
$380Delta
Sat, Aug 29 - Wed, Sep 9
Delta Logo
12:29 pm - 10:36 pm
IAD
-
BIL
12h 07m
2 stops
Delta Logo
6:25 pm - 9:10 am
BIL
-
IAD
12h 45m
2 stops
$385Delta
Thu, Jul 16 - Sun, Jul 19
Delta Logo
3:02 pm - 10:50 pm
IAD
-
BIL
9h 48m
2 stops
Delta Logo
6:34 pm - 10:18 am
BIL
-
IAD
13h 44m
2 stops
$389Delta
Sat, Aug 29 - Wed, Sep 9
American Airlines Logo
2:53 pm - 10:44 pm
IAD
-
BIL
9h 51m
1 stop
American Airlines Logo
7:00 am - 5:54 pm
BIL
-
IAD
8h 54m
1 stop
$394American Airlines
Tue, Jul 14 - Tue, Jul 21
Alaska Airlines Logo
6:03 am - 1:05 pm
IAD
-
BIL
9h 02m
1 stop
Alaska Airlines Logo
7:22 pm - 6:39 am
BIL
-
IAD
9h 17m
1 stop
$401Alaska Airlines
Sat, Jul 4 - Fri, Jul 10
Alaska Airlines Logo
6:03 am - 1:05 pm
IAD
-
BIL
9h 02m
1 stop
Alaska Airlines Logo
7:22 pm - 6:39 am
BIL
-
IAD
9h 17m
1 stop
$405Alaska Airlines
Booking Insights

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

Get data-powered insights and trends into flights from Dulles Intl to Billings 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 Billings?

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 Billings departing in August.

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

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 Billings, 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 Billings is March, where tickets cost $0 (return) on average. On the other hand, the most expensive months are February and August, where the average cost of round-trip tickets is $683 and $678 respectively.

Find deals

Good to know

Low seasonApril
Cheapest flight$176
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Washington Dulles Airport to Billings

When to book flights from Dulles Intl to Billings

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

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Billings was $176 for a one-way ticket and $351 for a round-trip.

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

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

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

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

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

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Billings.

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

    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 Billings.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Billings 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 Billings?

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

    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 Billings 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 airline flying from Dulles Intl to Billings

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Billings. 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 Billings? 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.
7.4
United AirlinesOverall score based on 9711 reviews
7.3Comfort
7.7Boarding
6.6Food
8.1Crew
7.1Entertainment
Airline reviews

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.

10.0 ExcellentAnonymous, May 2026
IAD - MUC
Read more United Airlines reviews

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

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.

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

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Billings (BIL)