$106+ Cheap flights from Washington to Idaho
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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Oct 24 — Oct 311
Round-trip
1 adult, Economy
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Cheapest flights from Washington to IdahoExplore the most affordable flight options available from Washington to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 24, 2026.
Explore the most affordable flight options available from Washington to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 24, 2026.
This MakeMyTrip deal was found by Cheapflights users on 9/22. 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 MakeMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:17 am -
Nonstop1h 39m
Sat 10/318:25 am -
Nonstop1h 42m
Deal found 9/22![Alaska Airlines logo]()
$197
This Trip.com deal was found by Cheapflights users on 9/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2412:48 pm -
Nonstop1h 35m
Wed 10/286:43 am -
Nonstop1h 37m
Deal found 9/21![Alaska Airlines logo]()
$201
This Delta deal was found by Cheapflights users on 9/23. 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.
Sat 10/312:45 pm -
Nonstop1h 29m
Sat 11/75:59 pm -
Nonstop1h 42m
Deal found 9/23![Delta logo]()
$207
This Delta deal was found by Cheapflights users on 9/23. 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.
Sat 10/249:45 pm -
Nonstop1h 21m
Sun 10/259:15 am -
Nonstop1h 30m
Deal found 9/23![Delta logo]()
$209
This SmartFares deal was found by Cheapflights users on 9/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:57 am -
Nonstop1h 38m
Sun 10/252:06 pm -
Nonstop1h 35m
Deal found 9/21![Alaska Airlines logo]()
$211
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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.
Wed 10/2110:10 am -
Nonstop1h 12m
Wed 10/284:47 pm -
Nonstop1h 08m
Deal found 9/21![Alaska Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 9/24. 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.
Sat 11/74:02 pm -
Nonstop1h 31m
Sun 11/810:34 am -
Nonstop1h 53m
Deal found 9/24![Delta logo]()
$217
This Delta deal was found by Cheapflights users on 9/24. 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.
Sat 10/249:45 pm -
Nonstop1h 21m
Tue 10/2712:19 pm -
1 stop4h 36m
Deal found 9/24![Delta logo]()
$218
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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 12/54:21 pm -
Nonstop1h 00m
Sat 12/126:37 am -
1 stop5h 34m
Deal found 9/22![Alaska Airlines logo]()
$222
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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.
Wed 10/2110:10 am -
Nonstop1h 12m
Sun 11/17:08 am -
Nonstop1h 12m
Deal found 9/21![Alaska Airlines logo]()
$227
This Delta deal was found by Cheapflights users on 9/24. 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 10/2312:47 pm -
Nonstop1h 33m
Mon 10/2612:08 pm -
Nonstop1h 52m
Deal found 9/24![Delta logo]()
$227
This Expedia deal was found by Cheapflights users on 9/23. 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.
Thu 11/123:44 pm -
Nonstop0h 57m
Sun 11/224:54 pm -
Nonstop1h 01m
Deal found 9/23![Alaska Airlines logo]()
$227
Best flights from Washington to IdahoDiscover carefully curated flight deals from Washington to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.
Discover carefully curated flight deals from Washington to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.
This Delta deal was found by Cheapflights users on 9/24. 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.
Sat 10/249:45 pm -
Nonstop1h 21m
Tue 10/279:15 am -
Nonstop1h 30m
Deal found 9/24![Delta logo]()
$209
This Alaska Airlines deal was found by Cheapflights users on 9/23. 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 11/196:30 am -
Nonstop1h 37m
Thu 12/32:05 pm -
Nonstop1h 44m
Deal found 9/23![Alaska Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 9/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:45 am -
1 stop6h 15m
Mon 11/28:30 pm -
1 stop5h 30m
Deal found 9/21![Southwest logo]()
$247
This Delta deal was found by Cheapflights users on 9/22. 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.
Sat 10/249:45 pm -
Nonstop1h 21m
Sun 10/259:15 am -
Nonstop1h 30m
Deal found 9/22![Delta logo]()
$209
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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 11/75:54 pm -
1 stop4h 55m
Mon 11/96:00 pm -
Nonstop1h 11m
Deal found 9/19![Alaska Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 9/22. 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 10/289:45 pm -
Nonstop1h 21m
Sat 10/3112:19 pm -
1 stop6h 43m
Deal found 9/22![Delta logo]()
$218
This Southwest deal was found by Cheapflights users on 9/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:50 am -
1 stop4h 30m
Wed 10/2812:55 pm -
2 stops9h 50m
Deal found 9/19![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 9/22. 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.
Sat 10/315:30 am -
1 stop6h 09m
Mon 11/29:15 am -
Nonstop1h 30m
Deal found 9/22![Delta logo]()
$218
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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 12/55:33 pm -
1 stop5h 26m
Sat 12/126:37 am -
1 stop5h 34m
Deal found 9/21![Alaska Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 9/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:50 am -
1 stop4h 30m
Tue 11/36:20 am -
2 stops10h 40m
Deal found 9/21![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 9/23. 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 11/259:45 pm -
Nonstop1h 18m
Sun 11/299:08 am -
Nonstop1h 39m
Deal found 9/23![Delta logo]()
$229
This Alaska Airlines deal was found by Cheapflights users on 9/20. 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 12/33:14 pm -
1 stop3h 56m
Sun 12/68:56 am -
1 stop3h 45m
Deal found 9/20![Alaska Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 9/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:40 am -
1 stop4h 40m
Tue 10/277:45 am -
1 stop6h 30m
Deal found 9/21![Southwest logo]()
$262
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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 10/278:35 pm -
1 stop16h 12m
Tue 11/36:21 pm -
Nonstop1h 36m
Deal found 9/21![Alaska Airlines logo]()
$265
This Delta deal was found by Cheapflights users on 9/23. 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 10/265:10 am -
1 stop3h 44m
Wed 10/288:59 am -
1 stop6h 51m
Deal found 9/23![Delta logo]()
$247
This Southwest deal was found by Cheapflights users on 9/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:00 am -
1 stop7h 10m
Mon 11/95:35 am -
2 stops9h 20m
Deal found 9/19![Southwest logo]()
$272
This Delta deal was found by Cheapflights users on 9/23. 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.
Sat 11/79:30 am -
1 stop4h 50m
Mon 11/912:13 pm -
1 stop5h 48m
Deal found 9/23![Delta logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 9/23. 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 10/171:55 pm -
Nonstop1h 12m
Wed 10/217:30 am -
Nonstop1h 13m
Deal found 9/23![Alaska Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 9/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:50 am -
1 stop5h 00m
Mon 11/25:35 am -
2 stops9h 20m
Deal found 9/21![Southwest logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 9/23. 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 10/225:00 pm -
Nonstop0h 57m
Thu 10/294:24 pm -
Nonstop0h 59m
Deal found 9/23![Alaska Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 9/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/192:30 pm -
2 stops10h 15m
Tue 10/201:25 pm -
2 stops10h 00m
Deal found 9/22![Southwest logo]()
$293
This Delta deal was found by Cheapflights users on 9/24. 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 10/295:30 am -
1 stop5h 50m
Mon 11/21:00 pm -
1 stop4h 24m
Deal found 9/24![Delta logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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 11/77:40 am -
1 stop4h 17m
Sun 11/88:20 am -
Nonstop1h 45m
Deal found 9/21![Alaska Airlines logo]()
$282
This Southwest deal was found by Cheapflights users on 9/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2012:40 pm -
2 stops8h 30m
Tue 2/911:55 am -
1 stop6h 10m
Deal found 9/19![Southwest logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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 1/17:57 pm -
Nonstop1h 28m
Tue 1/57:00 pm -
Nonstop1h 49m
Deal found 9/22![Alaska Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 9/21. 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.
Sat 10/109:45 pm -
Nonstop1h 21m
Mon 10/199:15 am -
Nonstop1h 30m
Deal found 9/21![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 9/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:15 am -
1 stop7h 50m
Mon 10/197:45 pm -
1 stop6h 15m
Deal found 9/20![Southwest logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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 11/123:44 pm -
Nonstop0h 57m
Sat 11/146:37 am -
1 stop5h 24m
Deal found 9/19![Alaska Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 9/24. 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 10/165:10 am -
1 stop3h 44m
Sun 10/183:36 pm -
1 stop4h 09m
Deal found 9/24![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 9/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1210:45 am -
2 stops9h 25m
Sun 11/155:00 am -
1 stop6h 05m
Deal found 9/22![Southwest logo]()
$311
Last-minute flights from Washington to IdahoDiscover last-minute flight deals from Washington to Idaho. Data last updated September 24, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Idaho. Data last updated September 24, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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.
Wed 10/2110:10 am -
Nonstop1h 12m
Wed 10/284:47 pm -
Nonstop1h 08m
Deal found 9/21![Alaska Airlines logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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.
Wed 10/2110:10 am -
Nonstop1h 12m
Sun 11/17:08 am -
Nonstop1h 12m
Deal found 9/21![Alaska Airlines logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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.
Wed 10/2110:10 am -
Nonstop1h 12m
Mon 11/24:24 pm -
1 stop3h 20m
Deal found 9/21![Alaska Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 9/24. 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 10/2312:47 pm -
Nonstop1h 33m
Mon 10/2612:08 pm -
Nonstop1h 52m
Deal found 9/24![Delta logo]()
$227
This Trip.com deal was found by Cheapflights users on 9/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2412:48 pm -
Nonstop1h 35m
Wed 10/286:43 am -
Nonstop1h 37m
Deal found 9/21![Alaska Airlines logo]()
$201
This Delta deal was found by Cheapflights users on 9/24. 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.
Sat 10/249:45 pm -
Nonstop1h 21m
Tue 10/279:15 am -
Nonstop1h 30m
Deal found 9/24![Delta logo]()
$209
This SmartFares deal was found by Cheapflights users on 9/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:57 am -
Nonstop1h 38m
Sun 10/252:06 pm -
Nonstop1h 35m
Deal found 9/21![Alaska Airlines logo]()
$211
This Delta deal was found by Cheapflights users on 9/24. 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.
Sat 10/244:02 pm -
Nonstop1h 31m
Sun 10/2510:34 am -
Nonstop1h 53m
Deal found 9/24![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 9/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:05 am -
2 stops7h 45m
Wed 10/2811:55 am -
1 stop7h 50m
Deal found 9/21![Southwest logo]()
$232
This MakeMyTrip deal was found by Cheapflights users on 9/22. 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 MakeMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:17 am -
Nonstop1h 39m
Sat 10/318:25 am -
Nonstop1h 42m
Deal found 9/22![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 9/22. 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 10/285:30 am -
1 stop6h 09m
Sat 10/3112:19 pm -
1 stop6h 43m
Deal found 9/22![Delta logo]()
$228
This Delta deal was found by Cheapflights users on 9/23. 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.
Sat 10/312:45 pm -
Nonstop1h 29m
Sat 11/75:59 pm -
Nonstop1h 42m
Deal found 9/23![Delta logo]()
$207
One-way flights from Washington to IdahoSearch for one-way flight options from Washington to Idaho. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.
Search for one-way flight options from Washington to Idaho. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.
This Trip.com deal was found by Cheapflights users on 9/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:20 am -
1 stop4h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Alaska Airlines logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:14 pm -
1 stop24h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$113
This Trip.com deal was found by Cheapflights users on 9/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:28 am -
1 stop3h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Alaska Airlines logo]()
$114
This Southwest deal was found by Cheapflights users on 9/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/242:05 pm -
1 stop6h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Southwest logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 9/21. 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 11/38:09 pm -
2 stops40h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Frontier logo]()
$116
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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 10/316:03 am -
1 stop5h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Alaska Airlines logo]()
$119
This Southwest deal was found by Cheapflights users on 9/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:15 pm -
2 stops7h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Southwest logo]()
$124
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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 11/177:40 am -
1 stop4h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Alaska Airlines logo]()
$124
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:16 pm -
1 stop15h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$128
This Delta deal was found by Cheapflights users on 9/22. 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 10/235:38 pm -
1 stop5h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Delta logo]()
$129
This Southwest deal was found by Cheapflights users on 9/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:35 am -
2 stops9h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Southwest logo]()
$129
This Southwest deal was found by Cheapflights users on 9/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:40 am -
1 stop4h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Southwest logo]()
$134
Find flight deals from Washington to Idaho
Keep the following information in mind while searching for Washington to Idaho flight deals. Data was last updated September 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $197 (MakeMyTrip) |
One-way from | $106 (Trip.com) |
Popular in | July |
Cheapest in | January |
Average price | $297 |
Good round-trip deal | $187 or less |
Good one-way deal | $143 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to Idaho 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 24, 2026.
Use the filters below to find and compare flights from Washington to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleBoise
SEA Seattle/Tacoma Intl - BOI Boise Air Term. Gowen Fld
SEABOI
Seattle/Tacoma Intl
Thu 12/31
5:00 am-11:12 am
1 stop5h 12m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$124
SpokaneBoise
GEG Spokane - BOI Boise Air Term. Gowen Fld
GEGBOI
Spokane
Sun 10/25
5:10 am-9:54 am
1 stop3h 44m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$129
SeattleBoise
SEA Seattle/Tacoma Intl - BOI Boise Air Term. Gowen Fld
SEABOI
Seattle/Tacoma Intl
Thu 10/22
3:55 pm-1:45 am
2 stops8h 50m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$139
SeattleBoise
SEA Seattle/Tacoma Intl - BOI Boise Air Term. Gowen Fld
SEABOI
Seattle/Tacoma Intl
Sun 10/25
7:17 am-9:56 am
Nonstop1h 39m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$144
SpokaneBoise
GEG Spokane - BOI Boise Air Term. Gowen Fld
GEGBOI
Spokane
Mon 10/19
6:15 pm-12:10 am
1 stop4h 55m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$144
SeattleBoise
SEA Seattle/Tacoma Intl - BOI Boise Air Term. Gowen Fld
SEABOI
Seattle/Tacoma Intl
Fri 11/13
2:47 pm-5:17 pm
Nonstop1h 30m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$144
SeattleBoise
SEA Seattle/Tacoma Intl - BOI Boise Air Term. Gowen Fld
SEABOI
Seattle/Tacoma Intl
Thu 10/22
9:57 am-12:35 pm
Nonstop1h 38m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$144
SpokaneBoise
GEG Spokane - BOI Boise Air Term. Gowen Fld
GEGBOI
Spokane
Thu 10/15
10:35 am-4:05 pm
1 stop4h 30m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$144
SeattleBoise
SEA Seattle/Tacoma Intl - BOI Boise Air Term. Gowen Fld
SEABOI
Seattle/Tacoma Intl
Tue 10/20
8:59 am-11:27 am
Nonstop1h 28m
Boise Air Term. Gowen Fld
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$144
SeattleHailey
SEA Seattle/Tacoma Intl - SUN Hailey Sun Valley-Friedman
SEASUN
Seattle/Tacoma Intl
Wed 11/18
5:35 am-12:08 pm
1 stop5h 33m
Hailey Sun Valley-Friedman
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$149
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Washington with our price prediction graph.
SEA-BOI
SEA-LWS
GEG-BOI
PUW-BOI
SEA-SUN
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 Washington to Idaho
USWA-USID
SEA-BOI
SEA-LWS
GEG-BOI
PUW-BOI
What is the cheapest month to book a flight from State of Washington to Idaho?
Currently, January is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $194). Flying from State of Washington to Idaho in July is currently the most expensive (average of $355). 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 WA to ID?
Find hourly flight availability from Washington to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 24, 2026.
It’s optimal to fly from State of Washington to Idaho in the morning. By choosing this option you can save up to 8% on the cost of your flight, compared to a flight in the afternoon.
Weekly flight availability from State of Washington to Idaho
Explore weekly flight availability from Washington to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 24, 2026.
The most flights from USWA to USID are scheduled on a Wednesday (39 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (9 on average).
How much does it cost to fly round-trip from State of Washington to Idaho?
Airfare is typical for this route at the moment.
State of Washington to Idaho flights typically cost between $187 and $347 in October.The cheapest round-trip price found within the last 5 days was $197 on Alaska Airlines (Oct 28-Oct 31).
How far ahead should I book a flight from State of Washington to Idaho?
The price you pay for your flight from State of Washington to Idaho may vary depending on when you book. For the best chance of a lower fare, look to book 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from State of Washington to Idaho?
Use this chart to determine the cheapest time to fly round-trip from Washington to Idaho. Price data was last updated on September 19, 2026.
Travelers seeking maximum savings on their State of Washington to Idaho flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Idaho
Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated September 24, 2026.
Read through reviews of airlines operating flights from Washington to Idaho, such as Alaska Airlines and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Entertainment
7.0
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Entertainment
7.0
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Related info for your journey
Find useful and relevant information for your journey from Washington to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Washington to Idaho
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Idaho by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Washington to Idaho by cabin class
Find flights from Washington to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Washington and Idaho flights
Browse other Washington and Idaho flight options. Last updated on September 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Idaho
Find the right flight back to Washington after your stay in Idaho
Washington to Idaho flights
Consider these flights traveling from Washington to Idaho.
Top 2 airlines flying from Washington to Idaho
Discover the top 2 airlines that operate flights from Washington to Idaho. 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 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$353 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$106 | Average$318 | FlexibilityNo cancel fee | On-time75% |