$190+ Cheap flights from Montana to Dulles Intl (IAD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — IAD
Oct 16 — Oct 231
Round-trip
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Montana to Dulles IntlExplore the most affordable flight options available from Montana to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2026.
Explore the most affordable flight options available from Montana to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2026.
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:18 pm -
1 stop8h 17m
Wed 11/46:13 am -
1 stop8h 25m
Deal found 9/15![Delta logo]()
$368
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:26 pm -
1 stop28h 33m
Tue 11/35:17 pm -
1 stop24h 47m
Deal found 9/15![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:27 pm -
2 stops12h 52m
Sun 11/16:13 am -
1 stop8h 25m
Deal found 9/12![Delta logo]()
$374
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:08 pm -
1 stop8h 27m
Tue 11/36:13 am -
1 stop8h 15m
Deal found 9/15![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:27 pm -
2 stops12h 52m
Sat 10/246:05 am -
2 stops8h 33m
Deal found 9/11![Delta logo]()
$379
This Orbitz deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:59 pm -
1 stop8h 41m
Sat 10/247:02 am -
1 stop9h 13m
Deal found 9/11![Alaska Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:58 pm -
1 stop8h 37m
Mon 11/22:28 pm -
1 stop7h 47m
Deal found 9/11![Delta logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:56 am -
1 stop18h 24m
Wed 10/2812:31 pm -
2 stops22h 35m
Deal found 9/14![Multiple Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:08 pm -
2 stops9h 34m
Wed 11/46:05 am -
2 stops8h 23m
Deal found 9/15![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/263:00 pm -
Nonstop3h 47m
Fri 1/15:20 pm -
1 stop7h 37m
Deal found 9/13![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:29 pm -
2 stops12h 50m
Sat 10/248:13 am -
2 stops14h 02m
Deal found 9/12![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:48 pm -
1 stop6h 22m
Sun 11/156:10 am -
1 stop9h 20m
Deal found 9/12![United Airlines logo]()
$394
Best flights from Montana to Dulles IntlDiscover carefully curated flight deals from Montana to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2026.
Discover carefully curated flight deals from Montana to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2026.
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:27 pm -
2 stops12h 52m
Sun 11/16:13 am -
1 stop8h 25m
Deal found 9/12![Delta logo]()
$374
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:28 am -
1 stop9h 27m
Sun 11/156:10 am -
1 stop9h 30m
Deal found 9/12![United Airlines logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/272:06 pm -
1 stop7h 53m
Wed 10/289:38 am -
1 stop15h 16m
Deal found 9/15![Alaska Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:18 pm -
1 stop8h 17m
Wed 11/412:30 pm -
2 stops12h 10m
Deal found 9/15![Delta logo]()
$374
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/32:28 pm -
1 stop6h 57m
Sat 10/104:12 pm -
1 stop6h 58m
Deal found 9/12![United Airlines logo]()
$414
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:08 pm -
1 stop8h 27m
Sat 11/76:13 am -
1 stop8h 15m
Deal found 9/15![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:26 pm -
1 stop28h 33m
Mon 11/27:46 am -
1 stop10h 18m
Deal found 9/15![Alaska Airlines logo]()
$456
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/291:08 pm -
1 stop8h 27m
Sun 11/16:13 am -
1 stop8h 15m
Deal found 9/15![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:26 pm -
1 stop6h 51m
Mon 10/56:35 am -
1 stop8h 53m
Deal found 9/14![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:27 pm -
2 stops12h 52m
Sat 10/246:05 am -
2 stops8h 33m
Deal found 9/14![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/307:00 am -
1 stop7h 27m
Tue 2/25:30 pm -
1 stop27h 27m
Deal found 9/15![Alaska Airlines logo]()
$461
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:26 pm -
1 stop8h 26m
Sun 10/186:10 am -
1 stop7h 18m
Deal found 9/14![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:30 am -
1 stop5h 18m
Fri 11/137:00 am -
1 stop7h 18m
Deal found 9/14![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/2612:09 pm -
1 stop26h 18m
Sat 1/305:30 pm -
1 stop19h 59m
Deal found 9/15![Alaska Airlines logo]()
$473
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:07 pm -
2 stops9h 34m
Sun 11/157:00 am -
1 stop7h 27m
Deal found 9/12![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/232:25 pm -
1 stop6h 48m
Tue 1/264:08 pm -
1 stop7h 12m
Deal found 9/12![United Airlines logo]()
$468
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/95:00 pm -
1 stop21h 27m
Tue 1/125:30 pm -
1 stop24h 53m
Deal found 9/15![Alaska Airlines logo]()
$478
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/11:08 pm -
2 stops9h 34m
Sat 11/76:13 am -
1 stop8h 15m
Deal found 9/15![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:28 am -
1 stop7h 16m
Mon 11/22:05 pm -
1 stop9h 26m
Deal found 9/15![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:58 pm -
2 stops9h 44m
Wed 11/46:13 am -
1 stop8h 05m
Deal found 9/13![Delta logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:59 pm -
1 stop8h 41m
Mon 10/197:24 pm -
2 stops24h 55m
Deal found 9/11![Alaska Airlines logo]()
$516
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/262:42 pm -
1 stop6h 31m
Sat 1/302:25 pm -
1 stop8h 54m
Deal found 9/14![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:29 pm -
2 stops12h 50m
Sat 10/248:13 am -
2 stops14h 02m
Deal found 9/12![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:48 pm -
1 stop6h 27m
Fri 11/62:05 pm -
1 stop9h 25m
Deal found 9/15![United Airlines logo]()
$494
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:58 pm -
2 stops9h 44m
Sat 10/3111:10 am -
2 stops13h 15m
Deal found 9/13![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:48 pm -
1 stop6h 20m
Fri 11/64:10 pm -
1 stop7h 20m
Deal found 9/15![United Airlines logo]()
$494
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:14 pm -
1 stop8h 21m
Tue 11/1012:01 pm -
1 stop9h 56m
Deal found 9/11![Delta logo]()
$399
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:00 am -
1 stop6h 01m
Sat 10/36:15 am -
1 stop7h 51m
Deal found 9/14![United Airlines logo]()
$495
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:19 pm -
1 stop8h 28m
Tue 11/177:00 am -
1 stop7h 39m
Deal found 9/11![Delta logo]()
$399
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:00 am -
1 stop6h 01m
Mon 10/196:10 am -
1 stop7h 35m
Deal found 9/10![United Airlines logo]()
$499
Last-minute flights from Montana to Dulles IntlDiscover last-minute flight deals from Montana to Dulles Intl. Data last updated September 16, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to Dulles Intl. Data last updated September 16, 2026 and is based on user searches.
This Orbitz deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:59 pm -
1 stop8h 41m
Sat 10/247:02 am -
1 stop9h 13m
Deal found 9/11![Alaska Airlines logo]()
$379
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:57 pm -
1 stop9h 20m
Sat 10/2412:40 pm -
1 stop6h 36m
Deal found 9/11![United Airlines logo]()
$394
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:27 pm -
2 stops12h 52m
Sat 10/246:05 am -
2 stops8h 33m
Deal found 9/11![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:29 pm -
2 stops12h 50m
Sat 10/248:13 am -
2 stops14h 02m
Deal found 9/12![Delta logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:56 am -
1 stop18h 24m
Wed 10/2812:31 pm -
2 stops22h 35m
Deal found 9/15![Multiple Airlines logo]()
$380
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:27 pm -
2 stops12h 52m
Sun 11/16:13 am -
1 stop8h 25m
Deal found 9/12![Delta logo]()
$374
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:26 pm -
1 stop28h 33m
Tue 11/35:17 pm -
1 stop24h 47m
Deal found 9/15![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:14 pm -
1 stop8h 21m
Tue 11/1012:01 pm -
1 stop9h 56m
Deal found 9/11![Delta logo]()
$399
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:08 pm -
1 stop8h 27m
Tue 11/36:13 am -
1 stop8h 15m
Deal found 9/15![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:58 pm -
1 stop8h 37m
Mon 11/22:28 pm -
1 stop7h 47m
Deal found 9/11![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:08 pm -
2 stops9h 34m
Wed 11/46:05 am -
2 stops8h 23m
Deal found 9/15![Delta logo]()
$389
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:18 pm -
1 stop8h 17m
Wed 11/46:13 am -
1 stop8h 25m
Deal found 9/15![Delta logo]()
$368
One-way flights from Montana to Dulles IntlSearch for one-way flight options from Montana to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 16, 2026.
Search for one-way flight options from Montana to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 16, 2026.
This Expedia deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/134:55 pm -
1 stop10h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Alaska Airlines logo]()
$190
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:28 pm -
1 stop8h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$200
This Priceline deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:55 pm -
1 stop8h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Alaska Airlines logo]()
$200
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/141:10 pm -
1 stop8h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Delta logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:56 am -
1 stop18h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$205
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/132:35 pm -
1 stop6h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![United Airlines logo]()
$210
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:57 pm -
1 stop9h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![United Airlines logo]()
$210
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/153:35 pm -
1 stop5h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Delta logo]()
$215
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:59 pm -
1 stop8h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Alaska Airlines logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2410:03 am -
1 stop17h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$224
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:26 pm -
1 stop6h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/812:46 pm -
2 stops32h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$228
Find flight deals from Montana to Dulles Intl
Keep the following information in mind while searching for Montana to Dulles Intl flight deals. Data was last updated September 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $359 (Delta) |
One-way from | $190 (Expedia) |
Popular in | August |
Cheapest in | January |
Average price | $471 |
Good round-trip deal | $696 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Montana to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 16, 2026.
Use the filters below to find and compare flights from Montana to Washington, D.C. Dulles Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HelenaWashington, D.C.
HLN Helena - IAD Washington, D.C. Dulles Intl
HLNIAD
Helena
Sun 12/13
4:55 pm-5:35 am
1 stop10h 40m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$190
MissoulaWashington, D.C.
MSO Missoula Johnson-Bell Field - IAD Washington, D.C. Dulles Intl
MSOIAD
Missoula Johnson-Bell Field
Fri 10/23
4:15 pm-5:46 am
1 stop11h 31m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$200
HelenaWashington, D.C.
HLN Helena - IAD Washington, D.C. Dulles Intl
HLNIAD
Helena
Mon 12/14
1:10 pm-11:47 pm
1 stop8h 37m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$203
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Fri 10/23
5:57 pm-5:17 am
1 stop9h 20m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$210
BozemanWashington, D.C.
BZN Bozeman Gallatin Field - IAD Washington, D.C. Dulles Intl
BZNIAD
Bozeman Gallatin Field
Thu 10/29
6:59 pm-5:40 am
1 stop8h 41m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$220
KalispellWashington, D.C.
FCA Kalispell Glacier Park - IAD Washington, D.C. Dulles Intl
FCAIAD
Kalispell Glacier Park
Tue 11/17
12:25 pm-12:41 am
2 stops10h 16m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$220
KalispellWashington, D.C.
FCA Kalispell Glacier Park - IAD Washington, D.C. Dulles Intl
FCAIAD
Kalispell Glacier Park
Thu 10/22
12:26 pm-10:52 pm
1 stop8h 26m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$225
MissoulaWashington, D.C.
MSO Missoula Johnson-Bell Field - IAD Washington, D.C. Dulles Intl
MSOIAD
Missoula Johnson-Bell Field
Wed 9/30
1:27 pm-12:41 am
2 stops9h 14m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$240
Quickest round-trip
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Sat 10/17
6:16 am-1:48 pm
1 stop5h 32m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$240
HelenaWashington, D.C.
HLN Helena - IAD Washington, D.C. Dulles Intl
HLNIAD
Helena
Tue 10/13
1:08 pm-12:42 am
2 stops9h 34m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$245
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Montana to Dulles Intl
Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Montana with our price prediction graph.
HLN-IAD
MSO-IAD
BIL-IAD
BZN-IAD
FCA-IAD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Montana to Washington, D.C. Dulles Intl Airport
USMT-IAD
HLN-IAD
MSO-IAD
BIL-IAD
BZN-IAD
What is the cheapest month to book a flight from Montana to Washington, D.C. Dulles Intl Airport?
Currently, November is the cheapest month in which you can book a flight from Montana to Washington, D.C. Dulles Intl Airport (average of $366). Flying from Montana to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $1,161). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from MT to IAD?
Find hourly flight availability from Montana to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Montana to Washington, D.C. Dulles Intl Airport as you normally would.
Related info for your journey
Find useful and relevant information for your journey from Montana to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Washington, D.C. Dulles Intl Airport?
Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locationsAlexandria
Arlington
Owings Mills
Lanham
Tysons
Woodbridge
Reston
Chantilly
Herndon
Hyattsville
Rockville
Fredericksburg
Falls Church
Sterling
Hanover
Laurel
Springfield
Oxon Hill
Clinton
Hunt Valley
Browse thousands of different options on Cheapflights for your next trip
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Complete your trip
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Alternative routes for Montana to Dulles Intl
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Complete your trip
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Other flights to Dulles Intl
Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 16, 2026.
Search flights from Montana to Dulles Intl by cabin class
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Montana and Dulles Intl flights
Browse other Montana and Dulles Intl flight options. Last updated on September 16, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Montana to Dulles Intl flights
Consider these flights traveling from Montana to Dulles Intl.
Top 2 airlines flying from Montana to Dulles Intl
Discover the top 2 airlines that operate flights from Montana to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$256 | Average$494 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$384 | Average$484 | FlexibilityNo cancel fee | On-time75% |