$94+ 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Dec 10 — Dec 171
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Washington with Cheapflights
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 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 November 10, 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 November 10, 2026.
This Delta deal was found by Cheapflights users on 11/8. 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 12/46:59 pm -
1 stop6h 06m
Mon 12/75:30 am -
1 stop5h 47m
Deal found 11/8![Delta logo]()
$187
This Delta deal was found by Cheapflights users on 11/5. 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 12/33:44 pm -
1 stop6h 26m
Thu 12/101:00 pm -
1 stop4h 38m
Deal found 11/5![Delta logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/222:58 pm -
Nonstop1h 03m
Sat 12/263:38 pm -
Nonstop1h 02m
Deal found 11/6![Alaska Airlines logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/232:58 pm -
Nonstop1h 03m
Fri 12/253:38 pm -
Nonstop1h 02m
Deal found 11/6![Alaska Airlines logo]()
$212
This Delta deal was found by Cheapflights users on 11/8. 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 12/226:15 am -
Nonstop1h 59m
Wed 12/238:39 am -
Nonstop1h 34m
Deal found 11/8![Delta logo]()
$217
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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 12/37:56 pm -
1 stop17h 31m
Thu 12/109:09 pm -
1 stop19h 11m
Deal found 11/5![Frontier logo]()
$221
This Delta deal was found by Cheapflights users on 11/9. 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 12/232:10 pm -
Nonstop1h 50m
Sun 1/310:46 am -
Nonstop1h 44m
Deal found 11/9![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/242:58 pm -
Nonstop1h 03m
Sun 12/273:38 pm -
Nonstop1h 02m
Deal found 11/6![Alaska Airlines logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 12/88:45 pm -
Nonstop1h 16m
Sat 12/124:36 pm -
Nonstop1h 08m
Deal found 11/7![Alaska Airlines logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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 12/110:16 am -
1 stop24h 00m
Wed 12/21:02 pm -
Nonstop1h 24m
Deal found 11/5![Alaska Airlines logo]()
$228
This Alaska Airlines deal was found by Cheapflights users on 11/8. 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 12/98:56 am -
1 stop5h 09m
Wed 12/93:50 pm -
1 stop3h 20m
Deal found 11/8![Alaska Airlines logo]()
$231
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 12/2510:03 am -
Nonstop1h 41m
Fri 12/251:03 pm -
Nonstop1h 24m
Deal found 11/7![Alaska Airlines logo]()
$232
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 November 10, 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 November 10, 2026.
This Delta deal was found by Cheapflights users on 11/6. 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 12/48:59 am -
1 stop4h 16m
Sun 12/65:00 am -
1 stop3h 56m
Deal found 11/6![Delta logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 12/232:58 pm -
Nonstop1h 03m
Fri 12/253:38 pm -
Nonstop1h 02m
Deal found 11/7![Alaska Airlines logo]()
$212
This Southwest deal was found by Cheapflights users on 11/9. 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 2/171:40 pm -
1 stop6h 10m
Sat 2/201:35 pm -
2 stops9h 20m
Deal found 11/9![Southwest logo]()
$242
This Delta deal was found by Cheapflights users on 11/9. 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 12/1010:37 am -
1 stop5h 09m
Thu 12/175:00 am -
1 stop5h 40m
Deal found 11/9![Delta logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
Wed 12/235:33 pm -
1 stop23h 18m
Thu 12/314:41 pm -
1 stop23h 07m
Deal found 11/5![Multiple Airlines logo]()
$429
This Alaska Airlines deal was found by Cheapflights users on 11/9. 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 12/242:12 pm -
Nonstop1h 43m
Sat 1/98:30 am -
Nonstop1h 30m
Deal found 11/9![Alaska Airlines logo]()
$227
This Delta deal was found by Cheapflights users on 11/8. 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 1/276:50 am -
Nonstop2h 02m
Mon 2/226:00 pm -
Nonstop1h 34m
Deal found 11/8![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 2/43:09 pm -
Nonstop1h 03m
Mon 2/83:49 pm -
Nonstop1h 00m
Deal found 11/7![Alaska Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 11/6. 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 12/107:20 am -
1 stop7h 10m
Sun 12/1312:05 pm -
2 stops11h 05m
Deal found 11/6![Southwest logo]()
$263
This Delta deal was found by Cheapflights users on 11/5. 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 12/173:44 pm -
1 stop4h 15m
Mon 12/215:40 pm -
1 stop5h 11m
Deal found 11/5![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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.
Sun 1/179:00 am -
1 stop5h 20m
Tue 1/198:46 am -
1 stop3h 31m
Deal found 11/5![Alaska Airlines logo]()
$247
This Delta deal was found by Cheapflights users on 11/9. 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 12/2411:53 am -
Nonstop1h 57m
Sun 1/108:45 am -
Nonstop1h 37m
Deal found 11/9![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 11/5. 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.
Fri 12/42:50 pm -
2 stops8h 25m
Fri 12/116:25 am -
1 stop7h 50m
Deal found 11/5![Southwest logo]()
$306
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 1/911:38 am -
Nonstop1h 52m
Mon 1/114:43 pm -
Nonstop1h 34m
Deal found 11/6![Alaska Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 11/8. 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 12/247:00 am -
Nonstop1h 32m
Sun 12/279:40 pm -
Nonstop1h 19m
Deal found 11/8![Delta logo]()
$239
This Delta deal was found by Cheapflights users on 11/6. 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 1/267:00 am -
Nonstop1h 35m
Fri 2/59:45 pm -
Nonstop1h 16m
Deal found 11/6![Delta logo]()
$239
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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 1/149:20 am -
1 stop6h 46m
Mon 1/187:54 pm -
Nonstop1h 23m
Deal found 11/5![Alaska Airlines logo]()
$265
This Southwest deal was found by Cheapflights users on 11/8. 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.
Fri 12/116:35 am -
1 stop7h 25m
Sun 12/135:00 am -
2 stops9h 15m
Deal found 11/8![Southwest logo]()
$322
This Southwest deal was found by Cheapflights users on 11/6. 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.
Fri 12/42:50 pm -
2 stops8h 25m
Sun 12/64:05 pm -
1 stop7h 50m
Deal found 11/6![Southwest logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/316:31 am -
1 stop4h 45m
Mon 1/43:38 pm -
Nonstop1h 02m
Deal found 11/6![Alaska Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 11/6. 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 3/247:00 am -
Nonstop1h 30m
Sun 3/289:30 pm -
Nonstop1h 19m
Deal found 11/6![Delta logo]()
$249
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 2/186:48 pm -
Nonstop1h 49m
Sun 2/217:05 am -
Nonstop1h 33m
Deal found 11/7![Alaska Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 11/9. 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 1/213:23 pm -
1 stop4h 16m
Sat 1/2310:14 am -
Nonstop1h 53m
Deal found 11/9![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 11/8. 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.
Mon 2/18:23 pm -
1 stop3h 22m
Fri 2/57:23 pm -
1 stop3h 21m
Deal found 11/8![Alaska Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 11/9. 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 12/102:50 pm -
2 stops8h 25m
Thu 12/175:50 pm -
2 stops6h 40m
Deal found 11/9![Southwest logo]()
$387
This Delta deal was found by Cheapflights users on 11/9. 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 12/216:09 pm -
1 stop4h 00m
Mon 12/285:00 am -
1 stop5h 13m
Deal found 11/9![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 12/202:58 pm -
Nonstop1h 03m
Wed 12/233:38 pm -
Nonstop1h 02m
Deal found 11/7![Alaska Airlines logo]()
$272
This Delta deal was found by Cheapflights users on 11/5. 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 12/39:08 am -
Nonstop1h 31m
Thu 12/109:45 pm -
Nonstop1h 19m
Deal found 11/5![Delta logo]()
$269
This Southwest deal was found by Cheapflights users on 11/7. 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 12/35:45 am -
2 stops8h 05m
Mon 12/76:05 am -
2 stops10h 55m
Deal found 11/7![Southwest logo]()
$417
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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 12/44:47 pm -
1 stop17h 45m
Fri 12/113:55 pm -
Nonstop1h 28m
Deal found 11/5![Alaska Airlines logo]()
$290
Last-minute flights from Idaho to WashingtonDiscover last-minute flight deals from Idaho to Washington. Data last updated November 10, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Washington. Data last updated November 10, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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 12/110:16 am -
1 stop24h 00m
Wed 12/21:02 pm -
Nonstop1h 24m
Deal found 11/5![Alaska Airlines logo]()
$228
This Delta deal was found by Cheapflights users on 11/5. 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 12/33:44 pm -
1 stop6h 26m
Thu 12/101:00 pm -
1 stop4h 38m
Deal found 11/5![Delta logo]()
$187
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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 12/37:56 pm -
1 stop17h 31m
Thu 12/109:09 pm -
1 stop19h 11m
Deal found 11/5![Frontier logo]()
$221
This Delta deal was found by Cheapflights users on 11/8. 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 12/46:59 pm -
1 stop6h 06m
Mon 12/75:30 am -
1 stop5h 47m
Deal found 11/8![Delta logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 12/88:45 pm -
Nonstop1h 16m
Sat 12/124:36 pm -
Nonstop1h 08m
Deal found 11/7![Alaska Airlines logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 11/8. 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 12/98:56 am -
1 stop5h 09m
Wed 12/93:50 pm -
1 stop3h 20m
Deal found 11/8![Alaska Airlines logo]()
$231
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/222:58 pm -
Nonstop1h 03m
Sat 12/263:38 pm -
Nonstop1h 02m
Deal found 11/6![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 11/8. 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 12/226:15 am -
Nonstop1h 59m
Wed 12/238:39 am -
Nonstop1h 34m
Deal found 11/8![Delta logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/232:58 pm -
Nonstop1h 03m
Fri 12/253:38 pm -
Nonstop1h 02m
Deal found 11/6![Alaska Airlines logo]()
$212
This Delta deal was found by Cheapflights users on 11/9. 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 12/232:10 pm -
Nonstop1h 50m
Sun 1/310:46 am -
Nonstop1h 44m
Deal found 11/9![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/242:58 pm -
Nonstop1h 03m
Sun 12/273:38 pm -
Nonstop1h 02m
Deal found 11/6![Alaska Airlines logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 12/2510:03 am -
Nonstop1h 41m
Fri 12/251:03 pm -
Nonstop1h 24m
Deal found 11/7![Alaska Airlines logo]()
$232
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 November 10, 2026.
Search for one-way flight options from Idaho to Washington. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
This Delta deal was found by Cheapflights users on 11/8. 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 12/155:35 am -
1 stop4h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Delta logo]()
$94
This Southwest deal was found by Cheapflights users on 11/8. 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 12/82:50 pm -
1 stop6h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Southwest logo]()
$94
This Cheapflightsfares deal was found by Cheapflights users on 11/8. 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 12/215:33 pm -
1 stop24h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Frontier logo]()
$103
This Southwest deal was found by Cheapflights users on 11/9. 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 12/153:30 pm -
1 stop8h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Southwest logo]()
$119
This Mytrip deal was found by Cheapflights users on 11/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/68:12 am -
1 stop4h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Alaska Airlines logo]()
$124
This Southwest deal was found by Cheapflights users on 11/9. 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 12/241:05 pm -
1 stop5h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Southwest logo]()
$129
This Delta deal was found by Cheapflights users on 11/8. 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 12/286:09 pm -
1 stop7h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Delta logo]()
$134
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 12/154:10 pm -
Nonstop1h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Alaska Airlines logo]()
$139
This Mytrip deal was found by Cheapflights users on 11/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/246:31 am -
Nonstop1h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Alaska Airlines logo]()
$144
This Orbitz deal was found by Cheapflights users on 11/8. 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.
Thu 12/312:58 pm -
Nonstop1h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Alaska Airlines logo]()
$144
This Travelocity deal was found by Cheapflights users on 11/7. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/97:00 am -
Nonstop1h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Alaska Airlines logo]()
$144
This Priceline deal was found by Cheapflights users on 11/5. 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 12/27:22 am -
1 stop7h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Alaska Airlines logo]()
$152
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 November 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $187 (Delta) |
One-way from | $94 (Delta) |
Popular in | June |
Cheapest in | January |
Average price | $310 |
Good round-trip deal | $287 or less |
Good one-way deal | $183 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 November 10, 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
BoiseSpokane
BOI Boise Air Term. Gowen Fld - GEG Spokane
BOIGEG
Boise Air Term. Gowen Fld
Tue 2/23
4:00 pm-9:11 pm
1 stop6h 11m
Spokane
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
Thu 12/24
1:05 pm-5:50 pm
1 stop5h 45m
Seattle/Tacoma Intl
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
Thu 12/17
3:40 pm-8:40 pm
1 stop6h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$129
BoiseSpokane
BOI Boise Air Term. Gowen Fld - GEG Spokane
BOIGEG
Boise Air Term. Gowen Fld
Mon 12/28
6:09 pm-12:14 am
1 stop7h 05m
Spokane
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
Sat 1/2
8:51 am-10:01 am
Nonstop2h 10m
Seattle/Tacoma Intl
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
Mon 12/21
11:53 am-12:50 pm
Nonstop1h 57m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$149
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Sun 1/24
6:50 am-7:52 am
Nonstop2h 02m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$149
BoiseSpokane
BOI Boise Air Term. Gowen Fld - GEG Spokane
BOIGEG
Boise Air Term. Gowen Fld
Tue 2/23
2:50 pm-10:25 pm
2 stops8h 35m
Spokane
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BoiseSpokane
BOI Boise Air Term. Gowen Fld - GEG Spokane
BOIGEG
Boise Air Term. Gowen Fld
Tue 12/8
6:20 am-1:30 pm
2 stops8h 10m
Spokane
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Wed 12/9
3:44 pm-8:33 pm
1 stop5h 49m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$164
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.
BOI-GEG
BOI-PUW
BOI-SEA
BOI-BLI
SUN-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
BOI-GEG
BOI-PUW
BOI-SEA
BOI-BLI
What is the cheapest month to book a flight from Idaho to State of Washington?
Currently, April is the cheapest month in which you can book a flight from Idaho to State of Washington (average of $183). Flying from Idaho to State of Washington in November is currently the most expensive (average of $354). 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 November 10, 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 21% 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 November 10, 2026.
The most flights from USID to USWA are scheduled on a Sunday (41 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 on average).
How much does it cost to fly round-trip from Idaho to State of Washington?
Airfare is below average for this route at the moment.
Idaho to State of Washington flights typically cost between $243 and $402 in December.The cheapest round-trip price found within the last 5 days was $217 on Delta (Dec 22-Dec 23).
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 39 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 November 7, 2026.
Travelers seeking maximum savings on their Idaho to State of Washington flight should consider departing on Saturday afternoons 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 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 November 10, 2026.
Get a feel of what it's like to fly with Alaska Airlines and Delta 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
Overall
7.9
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Food
7.0
Overall
7.9
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Food
7.0
Overall
7.9
Comfort
7.8
Crew
8.5
Boarding
8.1
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.
Browse thousands of different options on Cheapflights for your next trip
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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 November 10, 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 2 airlines flying from Idaho to Washington
Discover the top 2 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 November 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$343 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$99 | Average$362 | FlexibilityNo cancel fee | On-time75% |