$68+ Cheap flights from Idaho to Washington
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Sep 11 — Sep 181
Round-trip
1 adult, Economy
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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 August 12, 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 August 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:50 pm -
1 stop19h 52m
Wed 9/239:45 pm -
1 stop15h 10m
Deal found 8/11![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:24 pm -
1 stop20h 55m
Sat 9/57:06 pm -
1 stop15h 23m
Deal found 8/11![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/102:50 pm -
1 stop19h 52m
Sun 9/209:45 pm -
1 stop15h 10m
Deal found 8/12![Frontier logo]()
$178
This Alaska Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:36 pm -
Nonstop1h 14m
Sat 9/124:59 pm -
1 stop6h 54m
Deal found 8/10![Alaska Airlines logo]()
$181
This Alaska Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:30 pm -
1 stop22h 19m
Thu 9/101:03 pm -
Nonstop1h 27m
Deal found 8/10![Alaska Airlines logo]()
$182
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:15 am -
1 stop3h 45m
Wed 9/307:50 am -
1 stop6h 10m
Deal found 8/11![Southwest logo]()
$184
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:05 pm -
1 stop5h 20m
Thu 9/105:10 pm -
1 stop5h 30m
Deal found 8/11![Southwest logo]()
$186
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:15 am -
Nonstop1h 30m
Tue 10/209:45 pm -
Nonstop1h 21m
Deal found 8/12![Delta logo]()
$189
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/124:35 pm -
1 stop4h 25m
Tue 9/157:50 am -
1 stop6h 10m
Deal found 8/11![Southwest logo]()
$190
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:30 pm -
2 stops8h 30m
Wed 9/163:50 pm -
1 stop5h 30m
Deal found 8/10![Southwest logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:24 pm -
1 stop20h 55m
Wed 9/27:06 pm -
1 stop15h 23m
Deal found 8/11![Frontier logo]()
$194
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:50 pm -
1 stop5h 15m
Sat 10/32:10 pm -
2 stops7h 25m
Deal found 8/11![Southwest logo]()
$195
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 August 12, 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 August 12, 2026.
This Delta deal was found by Cheapflights users on 8/9. 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.
Fri 1/296:25 am -
Nonstop1h 30m
Mon 2/19:30 pm -
Nonstop1h 19m
Deal found 8/9![Delta logo]()
$189
This Alaska Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/164:20 pm -
Nonstop1h 36m
Sat 9/1911:43 am -
Nonstop1h 39m
Deal found 8/10![Alaska Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:10 pm -
1 stop4h 30m
Sat 10/315:45 am -
1 stop6h 15m
Deal found 8/11![Southwest logo]()
$222
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/14:25 pm -
1 stop6h 06m
Tue 9/228:40 am -
1 stop8h 09m
Deal found 8/7![United Airlines logo]()
$299
This Delta deal was found by Cheapflights users on 8/8. 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.
Sat 9/199:16 am -
Nonstop1h 29m
Sat 9/269:45 pm -
Nonstop1h 23m
Deal found 8/8![Delta logo]()
$189
This Delta deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:15 am -
Nonstop1h 30m
Tue 10/209:45 pm -
Nonstop1h 21m
Deal found 8/10![Delta logo]()
$189
This Alaska Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:47 pm -
Nonstop1h 08m
Wed 10/287:00 am -
Nonstop1h 08m
Deal found 8/11![Alaska Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 8/8. 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.
Wed 9/163:40 pm -
1 stop6h 35m
Wed 9/234:10 pm -
1 stop5h 20m
Deal found 8/8![Southwest logo]()
$227
This Delta deal was found by Cheapflights users on 8/8. 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.
Sat 10/179:15 am -
Nonstop1h 30m
Wed 10/219:45 pm -
Nonstop1h 21m
Deal found 8/8![Delta logo]()
$189
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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.
Sat 9/262:42 pm -
1 stop6h 02m
Sat 10/1012:13 pm -
1 stop3h 54m
Deal found 8/8![Alaska Airlines logo]()
$227
This Delta deal was found by Cheapflights users on 8/8. 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 10/99:15 am -
Nonstop1h 30m
Sat 10/109:45 pm -
Nonstop1h 21m
Deal found 8/8![Delta logo]()
$189
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:50 pm -
1 stop4h 40m
Sun 10/46:15 am -
1 stop6h 35m
Deal found 8/12![Southwest logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 9/165:52 am -
Nonstop1h 17m
Sat 9/1912:31 pm -
Nonstop1h 14m
Deal found 8/8![Alaska Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/114:55 pm -
1 stop8h 50m
Sun 9/136:50 am -
1 stop6h 55m
Deal found 8/12![Southwest logo]()
$247
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/73:36 pm -
Nonstop1h 48m
Sat 11/149:00 am -
Nonstop1h 33m
Deal found 8/12![Delta logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:57 pm -
Nonstop1h 53m
Sat 10/310:30 am -
Nonstop1h 51m
Deal found 8/12![Alaska Airlines logo]()
$237
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:35 pm -
1 stop8h 40m
Sun 9/278:30 am -
1 stop8h 19m
Deal found 8/11![United Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 8/8. 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 9/235:59 pm -
Nonstop1h 42m
Sat 9/2612:39 pm -
Nonstop1h 37m
Deal found 8/8![Delta logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:30 am -
Nonstop1h 13m
Sun 9/207:00 am -
Nonstop1h 09m
Deal found 8/12![Alaska Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 8/8. 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 10/68:25 am -
Nonstop1h 50m
Sat 10/177:35 pm -
Nonstop1h 33m
Deal found 8/8![Delta logo]()
$207
This Delta deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:45 am -
Nonstop1h 50m
Wed 9/164:04 pm -
Nonstop1h 36m
Deal found 8/10![Delta logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 8/7. 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 11/612:41 pm -
Nonstop1h 17m
Mon 11/97:19 am -
Nonstop1h 05m
Deal found 8/7![Alaska Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 8/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:40 pm -
1 stop8h 35m
Sun 10/255:05 am -
1 stop7h 20m
Deal found 8/8![United Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:18 am -
1 stop4h 22m
Sat 10/310:30 am -
Nonstop1h 51m
Deal found 8/12![Alaska Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 8/8. 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 9/213:28 pm -
Nonstop1h 42m
Fri 10/92:45 pm -
Nonstop1h 29m
Deal found 8/8![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:57 pm -
Nonstop1h 30m
Mon 11/168:08 am -
1 stop3h 17m
Deal found 8/11![Alaska Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:45 am -
1 stop5h 00m
Sun 10/257:00 am -
1 stop3h 27m
Deal found 8/11![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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.
Tue 10/274:20 pm -
Nonstop1h 21m
Wed 10/289:36 pm -
Nonstop1h 18m
Deal found 8/8![Alaska Airlines logo]()
$267
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:00 am -
2 stops14h 15m
Wed 9/2312:44 pm -
1 stop6h 56m
Deal found 8/11![United Airlines logo]()
$484
This Delta deal was found by Cheapflights users on 8/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:16 am -
Nonstop1h 29m
Thu 10/85:25 am -
1 stop6h 14m
Deal found 8/7![Delta logo]()
$228
Last-minute flights from Idaho to WashingtonDiscover last-minute flight deals from Idaho to Washington. Data last updated August 12, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Washington. Data last updated August 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:24 pm -
1 stop20h 55m
Sat 9/57:06 pm -
1 stop15h 23m
Deal found 8/11![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:24 pm -
1 stop20h 55m
Wed 9/27:06 pm -
1 stop15h 23m
Deal found 8/11![Frontier logo]()
$194
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:05 pm -
1 stop5h 20m
Thu 9/105:10 pm -
1 stop5h 30m
Deal found 8/11![Southwest logo]()
$186
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:55 pm -
1 stop6h 35m
Wed 9/97:50 am -
1 stop6h 10m
Deal found 8/11![Southwest logo]()
$196
This Alaska Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:30 pm -
1 stop22h 19m
Thu 9/101:03 pm -
Nonstop1h 27m
Deal found 8/10![Alaska Airlines logo]()
$182
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:30 pm -
2 stops8h 30m
Wed 9/163:50 pm -
1 stop5h 30m
Deal found 8/10![Southwest logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/102:50 pm -
1 stop19h 52m
Sun 9/209:45 pm -
1 stop15h 10m
Deal found 8/12![Frontier logo]()
$178
This Delta deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/109:16 am -
Nonstop1h 29m
Sun 9/139:45 pm -
Nonstop1h 23m
Deal found 8/10![Delta logo]()
$189
This Alaska Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:36 pm -
Nonstop1h 14m
Sat 9/124:59 pm -
1 stop6h 54m
Deal found 8/10![Alaska Airlines logo]()
$181
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/124:35 pm -
1 stop4h 25m
Tue 9/157:50 am -
1 stop6h 10m
Deal found 8/11![Southwest logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:50 pm -
1 stop19h 52m
Wed 9/239:45 pm -
1 stop15h 10m
Deal found 8/11![Frontier logo]()
$164
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:15 am -
1 stop3h 45m
Wed 9/307:50 am -
1 stop6h 10m
Deal found 8/11![Southwest logo]()
$184
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 August 12, 2026.
Search for one-way flight options from Idaho to Washington. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.
This Super.com deal was found by Cheapflights users on 8/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/173:55 pm -
Nonstop1h 41m
Deal found 8/8![Allegiant Air logo]()
$68
This Frontier deal was found by Cheapflights users on 8/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:24 pm -
1 stop5h 47m
Deal found 8/9![Frontier logo]()
$77
This Super.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/202:50 pm -
1 stop22h 04m
Deal found 8/10![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/93:52 pm -
1 stop20h 39m
Deal found 8/10![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/102:50 pm -
1 stop19h 52m
Deal found 8/11![Frontier logo]()
$91
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:40 pm -
1 stop7h 45m
Deal found 8/11![Southwest logo]()
$92
This Southwest deal was found by Cheapflights users on 8/9. 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.
Mon 8/312:55 pm -
1 stop8h 05m
Deal found 8/9![Southwest logo]()
$93
This Priceline deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:24 pm -
1 stop5h 47m
Deal found 8/11![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/123:52 pm -
1 stop19h 08m
Deal found 8/11![Frontier logo]()
$98
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:40 pm -
1 stop7h 45m
Deal found 8/10![Southwest logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/202:50 pm -
1 stop19h 52m
Deal found 8/11![Frontier logo]()
$103
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1611:30 am -
1 stop10h 15m
Deal found 8/11![Southwest logo]()
$104
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 August 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $164 (Kiwi.com) |
One-way from | $68 (Super.com) |
Popular in | June |
Cheapest in | January |
Average price | $278 |
Good round-trip deal | $257 or less |
Good one-way deal | $196 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 2,558,603 searches. Data last updated August 12, 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
LewistonSeattle
LWS Lewiston Nez Perce Rgnl - SEA Seattle/Tacoma Intl
LWSSEA
Lewiston Nez Perce Rgnl
Fri 1/29
6:25 am-7:55 am
Nonstop1h 30m
Seattle/Tacoma Intl
Mon 2/1
9:30 pm-10:49 pm
Nonstop1h 19m
$189
LewistonSeattle
LWS Lewiston Nez Perce Rgnl - SEA Seattle/Tacoma Intl
LWSSEA
Lewiston Nez Perce Rgnl
Sat 9/19
9:16 am-10:45 am
Nonstop1h 29m
Seattle/Tacoma Intl
Sat 9/26
9:45 pm-11:08 pm
Nonstop1h 23m
$189
LewistonSeattle
LWS Lewiston Nez Perce Rgnl - SEA Seattle/Tacoma Intl
LWSSEA
Lewiston Nez Perce Rgnl
Tue 10/13
9:15 am-10:45 am
Nonstop1h 30m
Seattle/Tacoma Intl
Tue 10/20
9:45 pm-11:06 pm
Nonstop1h 21m
$189
LewistonSeattle
LWS Lewiston Nez Perce Rgnl - SEA Seattle/Tacoma Intl
LWSSEA
Lewiston Nez Perce Rgnl
Sat 10/17
9:15 am-10:45 am
Nonstop1h 30m
Seattle/Tacoma Intl
Wed 10/21
9:45 pm-11:06 pm
Nonstop1h 21m
$189
LewistonSeattle
LWS Lewiston Nez Perce Rgnl - SEA Seattle/Tacoma Intl
LWSSEA
Lewiston Nez Perce Rgnl
Fri 10/9
9:15 am-10:45 am
Nonstop1h 30m
Seattle/Tacoma Intl
Sat 10/10
9:45 pm-11:06 pm
Nonstop1h 21m
$189
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Wed 9/16
4:20 pm-4:56 pm
Nonstop1h 36m
Seattle/Tacoma Intl
Sat 9/19
11:43 am-2:22 pm
Nonstop1h 39m
$207
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Sat 11/7
3:36 pm-4:24 pm
Nonstop1h 48m
Seattle/Tacoma Intl
Sat 11/14
9:00 am-11:33 am
Nonstop1h 33m
$207
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Wed 9/23
5:59 pm-6:41 pm
Nonstop1h 42m
Seattle/Tacoma Intl
Sat 9/26
12:39 pm-3:16 pm
Nonstop1h 37m
$207
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Tue 10/6
8:25 am-9:15 am
Nonstop1h 50m
Seattle/Tacoma Intl
Sat 10/17
7:35 pm-10:08 pm
Nonstop1h 33m
$207
BoiseSeattle
BOI Boise Air Term. Gowen Fld - SEA Seattle/Tacoma Intl
BOISEA
Boise Air Term. Gowen Fld
Wed 9/9
6:45 am-7:35 am
Nonstop1h 50m
Seattle/Tacoma Intl
Wed 9/16
4:04 pm-6:40 pm
Nonstop1h 36m
$207
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.
IDA-PDX
BOI-GEG
BOI-SEA
BOI-PDX
GEG-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
IDA-PDX
BOI-GEG
BOI-SEA
BOI-PDX
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 $175). Flying from Idaho to State of Washington in July is currently the most expensive (average of $342). 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 August 12, 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 morning tend to be the most expensive. A flight at noon could potentially save you up to 16% 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 August 12, 2026.
The most flights from USID to USWA are scheduled on a Tuesday (46 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (28 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 $197 and $349 in September.The cheapest round-trip price found within the last 5 days was $164 on Frontier (Sep 21-Sep 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 53 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 August 8, 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 August 12, 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.
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Overall
7.9
Comfort
7.8
Food
7.0
Crew
8.5
Boarding
8.1
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 August 12, 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 2,558,603 searches. Data last updated August 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$237 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$97 | Average$363 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$99 | Average$354 | FlexibilityNo cancel fee | On-time75% |