$106+ Cheap flights from Idaho to Washington
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.
BOI — SEA
Oct 24 — Oct 311
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Washington with Cheapflights
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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 Idaho to WashingtonExplore the most affordable flight options available from Idaho to Washington. 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 Idaho to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 24, 2026.
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.
Mon 12/217:00 am -
Nonstop1h 32m
Thu 1/79:30 pm -
Nonstop1h 19m
Deal found 9/22![Delta logo]()
$209
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:22 pm -
Nonstop1h 35m
Mon 10/265:40 pm -
Nonstop1h 26m
Deal found 9/24![Alaska Airlines logo]()
$217
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:48 am -
Nonstop1h 56m
Tue 11/38:15 am -
Nonstop1h 36m
Deal found 9/20![Alaska Airlines logo]()
$217
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 10/247:30 am -
Nonstop1h 13m
Wed 10/2810:10 am -
Nonstop1h 12m
Deal found 9/23![Alaska Airlines logo]()
$217
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 10/2410:34 am -
Nonstop1h 57m
Sun 10/257:15 am -
Nonstop1h 39m
Deal found 9/22![Delta logo]()
$218
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:12 am -
1 stop5h 07m
Sun 10/257:20 am -
1 stop4h 50m
Deal found 9/23![Alaska Airlines logo]()
$221
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.
Fri 10/236:45 am -
Nonstop1h 54m
Mon 10/267:15 am -
Nonstop1h 39m
Deal found 9/23![Delta logo]()
$227
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:04 pm -
Nonstop1h 43m
Tue 10/275:40 pm -
Nonstop1h 26m
Deal found 9/20![Alaska Airlines logo]()
$230
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:10 am -
1 stop8h 00m
Sat 10/317:40 am -
2 stops10h 25m
Deal found 9/24![Southwest logo]()
$232
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:30 pm -
1 stop5h 10m
Mon 10/266:50 pm -
1 stop5h 55m
Deal found 9/23![Southwest logo]()
$237
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 12/511:51 am -
Nonstop1h 59m
Mon 12/78:35 am -
Nonstop1h 34m
Deal found 9/22![Alaska Airlines logo]()
$237
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.
Fri 10/308:46 pm -
Nonstop1h 08m
Tue 11/312:26 pm -
1 stop3h 38m
Deal found 9/23![Alaska Airlines logo]()
$237
Best flights from Idaho to WashingtonDiscover carefully curated flight deals from Idaho to Washington 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 Idaho to Washington 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.
Tue 1/1212:30 pm -
1 stop6h 00m
Wed 1/279:30 pm -
Nonstop1h 19m
Deal found 9/24![Delta logo]()
$218
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 11/51:53 pm -
Nonstop1h 38m
Sun 11/86:30 am -
Nonstop1h 37m
Deal found 9/23![Alaska Airlines logo]()
$227
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 11/712:50 pm -
1 stop6h 45m
Mon 11/92:35 pm -
2 stops9h 20m
Deal found 9/22![Southwest logo]()
$242
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.
Mon 12/217:00 am -
Nonstop1h 32m
Thu 1/75:45 am -
1 stop6h 01m
Deal found 9/22![Delta logo]()
$218
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:36 pm -
1 stop23h 11m
Sun 1/35:37 pm -
1 stop20h 14m
Deal found 9/20![Allegiant Air logo]()
$468
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 12/511:51 am -
Nonstop1h 59m
Mon 12/78:35 am -
Nonstop1h 34m
Deal found 9/22![Alaska Airlines logo]()
$237
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/55:30 am -
2 stops8h 20m
Mon 12/73:20 pm -
1 stop6h 25m
Deal found 9/23![Southwest logo]()
$252
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3010:34 am -
Nonstop1h 57m
Sat 11/74:02 pm -
Nonstop1h 31m
Deal found 9/19![Delta logo]()
$237
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 12/53:00 pm -
Nonstop1h 14m
Mon 12/74:35 pm -
1 stop6h 24m
Deal found 9/23![Alaska Airlines logo]()
$237
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 10/219:15 am -
Nonstop1h 30m
Wed 10/289:45 pm -
Nonstop1h 21m
Deal found 9/23![Delta logo]()
$239
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.
Tue 10/202:25 pm -
1 stop9h 00m
Tue 10/275:40 am -
1 stop4h 40m
Deal found 9/22![Southwest logo]()
$267
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.
Fri 10/308:46 pm -
Nonstop1h 08m
Sun 11/14:39 pm -
1 stop6h 10m
Deal found 9/19![Alaska Airlines logo]()
$247
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/51:30 pm -
1 stop28h 30m
Fri 10/96:00 am -
1 stop6h 55m
Deal found 9/20![Multiple Airlines logo]()
$626
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 12/53:44 pm -
1 stop4h 15m
Mon 12/75:00 am -
1 stop5h 40m
Deal found 9/23![Delta logo]()
$247
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:40 pm -
1 stop8h 15m
Wed 10/285:35 am -
2 stops9h 25m
Deal found 9/23![Southwest logo]()
$272
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 11/611:33 am -
Nonstop1h 58m
Mon 11/98:15 am -
Nonstop1h 36m
Deal found 9/22![Alaska Airlines logo]()
$257
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:50 am -
1 stop5h 00m
Thu 10/292:30 pm -
2 stops8h 40m
Deal found 9/23![Southwest logo]()
$282
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/303:19 pm -
1 stop4h 43m
Tue 11/37:15 am -
1 stop6h 20m
Deal found 9/20![Delta logo]()
$257
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 10/304:18 pm -
Nonstop1h 38m
Sun 11/17:40 am -
1 stop4h 17m
Deal found 9/22![Alaska Airlines logo]()
$272
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 10/247:20 am -
1 stop7h 00m
Fri 10/302:30 pm -
2 stops10h 15m
Deal found 9/21![Southwest logo]()
$292
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 10/226:43 am -
Nonstop1h 37m
Mon 10/267:07 pm -
1 stop17h 40m
Deal found 9/20![Alaska Airlines logo]()
$275
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 11/61:00 pm -
1 stop4h 24m
Mon 11/95:35 am -
1 stop5h 33m
Deal found 9/24![Delta logo]()
$277
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.
Fri 10/3010:06 am -
Nonstop1h 34m
Mon 11/28:48 pm -
1 stop15h 42m
Deal found 9/19![Alaska Airlines logo]()
$275
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.
Sun 11/810:34 am -
Nonstop1h 53m
Thu 11/127:50 pm -
Nonstop1h 36m
Deal found 9/23![Delta logo]()
$287
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.
Fri 11/66:21 pm -
Nonstop1h 36m
Mon 11/98:48 pm -
1 stop15h 42m
Deal found 9/20![Alaska Airlines logo]()
$275
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:36 pm -
1 stop23h 11m
Sat 1/26:15 pm -
2 stops43h 36m
Deal found 9/20![Allegiant Air logo]()
$540
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:36 pm -
1 stop4h 09m
Sun 10/255:38 pm -
1 stop5h 21m
Deal found 9/20![Delta logo]()
$292
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 10/224:24 pm -
Nonstop0h 59m
Mon 10/265:00 pm -
Nonstop0h 57m
Deal found 9/23![Alaska Airlines logo]()
$277
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.
Tue 10/2012:08 pm -
Nonstop1h 52m
Tue 10/274:02 pm -
Nonstop1h 31m
Deal found 9/21![Delta logo]()
$297
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 10/154:24 pm -
Nonstop0h 59m
Sun 10/185:00 pm -
Nonstop0h 57m
Deal found 9/20![Alaska Airlines logo]()
$277
Last-minute flights from Idaho to WashingtonDiscover last-minute flight deals from Idaho to Washington. Data last updated September 24, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Washington. Data last updated September 24, 2026 and is based on user searches.
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 10/219:15 am -
Nonstop1h 30m
Wed 10/289:45 pm -
Nonstop1h 21m
Deal found 9/23![Delta logo]()
$239
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.
Fri 10/236:45 am -
Nonstop1h 54m
Mon 10/267:15 am -
Nonstop1h 39m
Deal found 9/23![Delta logo]()
$227
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:22 pm -
Nonstop1h 35m
Mon 10/265:40 pm -
Nonstop1h 26m
Deal found 9/24![Alaska Airlines logo]()
$217
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 10/247:30 am -
Nonstop1h 13m
Wed 10/2810:10 am -
Nonstop1h 12m
Deal found 9/23![Alaska Airlines logo]()
$217
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 10/2410:34 am -
Nonstop1h 57m
Sun 10/257:15 am -
Nonstop1h 39m
Deal found 9/22![Delta logo]()
$218
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:12 am -
1 stop5h 07m
Sun 10/257:20 am -
1 stop4h 50m
Deal found 9/23![Alaska Airlines logo]()
$221
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:04 pm -
Nonstop1h 43m
Tue 10/275:40 pm -
Nonstop1h 26m
Deal found 9/20![Alaska Airlines logo]()
$230
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:10 am -
1 stop8h 00m
Sat 10/317:40 am -
2 stops10h 25m
Deal found 9/24![Southwest logo]()
$232
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:30 pm -
1 stop5h 10m
Mon 10/266:50 pm -
1 stop5h 55m
Deal found 9/23![Southwest logo]()
$237
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.
Fri 10/308:46 pm -
Nonstop1h 08m
Tue 11/312:26 pm -
1 stop3h 38m
Deal found 9/23![Alaska Airlines logo]()
$237
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:48 am -
Nonstop1h 56m
Tue 11/38:15 am -
Nonstop1h 36m
Deal found 9/20![Alaska Airlines logo]()
$217
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:00 pm -
1 stop4h 24m
Tue 11/37:15 am -
1 stop6h 20m
Deal found 9/20![Delta logo]()
$237
One-way flights from Idaho to WashingtonSearch for one-way flight options from Idaho to Washington. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.
Search for one-way flight options from Idaho to Washington. 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 10/279:12 am -
1 stop5h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Alaska Airlines logo]()
$106
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 10/241:32 pm -
1 stop3h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Alaska Airlines logo]()
$114
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:37 am -
1 stop5h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Alaska Airlines logo]()
$114
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:50 pm -
1 stop21h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Frontier logo]()
$116
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.
Mon 10/265:59 am -
1 stop4h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Alaska Airlines logo]()
$117
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:57 pm -
1 stop4h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Alaska Airlines logo]()
$118
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/67:57 pm -
1 stop4h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Alaska Airlines logo]()
$119
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.
Tue 11/104:24 pm -
1 stop3h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Alaska Airlines logo]()
$119
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:57 pm -
1 stop4h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Alaska Airlines logo]()
$120
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.
Wed 10/2112:55 pm -
1 stop7h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Southwest logo]()
$124
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.
Tue 11/106:20 am -
2 stops8h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Southwest logo]()
$124
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/52:49 pm -
1 stop19h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Frontier logo]()
$128
Find flight deals from Idaho to Washington
Keep the following information in mind while searching for Idaho to Washington flight deals. Data was last updated September 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $185 (SmartFares) |
One-way from | $106 (Trip.com) |
Popular in | June |
Cheapest in | January |
Average price | $283 |
Good round-trip deal | $227 or less |
Good one-way deal | $205 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho to Washington 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 Idaho to Washington that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Sat 10/31
8:15 am-12:20 pm
1 stop5h 05m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$124
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Wed 11/18
7:57 pm-11:00 pm
1 stop4h 03m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$124
BoiseSpokane
BOI Boise Air Term. Gowen Fld - GEG Spokane
BOIGEG
Boise Air Term. Gowen Fld
Thu 10/22
6:43 am-11:39 am
1 stop5h 56m
Spokane
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$129
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Sat 10/24
3:36 pm-4:24 pm
Nonstop1h 48m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$134
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Sun 11/15
5:43 am-8:15 am
1 stop3h 32m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$134
BoiseSpokane
BOI Boise Air Term. Gowen Fld - GEG Spokane
BOIGEG
Boise Air Term. Gowen Fld
Wed 12/16
3:45 pm-10:10 pm
2 stops7h 25m
Spokane
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
BoiseSpokane
BOI Boise Air Term. Gowen Fld - GEG Spokane
BOIGEG
Boise Air Term. Gowen Fld
Tue 10/20
1:25 pm-10:25 pm
2 stops10h 00m
Spokane
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Tue 10/20
5:59 pm-6:41 pm
Nonstop1h 42m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$144
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Mon 11/23
3:38 pm-4:31 pm
Nonstop1h 53m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$144
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Thu 11/19
6:37 am-7:20 am
Nonstop1h 43m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$144
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Idaho to Washington
Have a flexible travel schedule? Discover the best time to fly to Washington from Idaho with our price prediction graph.
LWS-SEA
BOI-SEA
SUN-SEA
BOI-GEG
IDA-SEA
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 Idaho to Washington
USID-USWA
LWS-SEA
BOI-SEA
SUN-SEA
BOI-GEG
What is the cheapest month to book a flight from Idaho to State of Washington?
Currently, January is the cheapest month in which you can book a flight from Idaho to State of Washington (average of $179). Flying from Idaho to State of Washington in July is currently the most expensive (average of $349). 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 ID to WA?
Find hourly flight availability from Idaho to Washington. 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.
One of the essential ways to save on airfare from Idaho to State of Washington is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 14% on airfare.
Weekly flight availability from Idaho to State of Washington
Explore weekly flight availability from Idaho to Washington. 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 USID to USWA are scheduled on a Monday (43 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (29 on average).
How much does it cost to fly round-trip from Idaho to State of Washington?
Airfare is typical for this route at the moment.
Idaho to State of Washington flights typically cost between $206 and $349 in October.The cheapest round-trip price found within the last 5 days was $217 on Delta (Oct 24-Oct 25).
How far ahead should I book a flight from Idaho to State of Washington?
The price you pay for your flight from Idaho to State of Washington may vary depending on when you book. For the best chance of a lower fare, look to book 40 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 Idaho to State of Washington?
Use this chart to determine the cheapest time to fly round-trip from Idaho to Washington. Price data was last updated on September 19, 2026.
Travelers seeking maximum savings on their Idaho to State of Washington flight should consider departing on Monday afternoons when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Washington
Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated September 24, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andHawaiian Airlines from Idaho to Washington by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Comfort
7.8
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Food
7.0
Boarding
8.1
Comfort
7.8
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Food
7.0
Boarding
8.1
Comfort
7.8
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Food
7.0
Boarding
8.1
Comfort
7.8
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Related info for your journey
Find useful and relevant information for your journey from Idaho to Washington. 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 Idaho to Washington
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Washington by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Idaho to Washington by cabin class
Find flights from Idaho to Washington, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Idaho and Washington flights
Browse other Idaho and Washington 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 Washington
Find the right flight back to Idaho after your stay in Washington
Idaho to Washington flights
Consider these flights traveling from Idaho to Washington.
Top 3 airlines flying from Idaho to Washington
Discover the top 3 airlines that operate flights from Idaho to Washington. 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$96 | Average$367 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$99 | Average$337 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$143 | Average$247 | FlexibilityNo cancel fee | On-time85% |