$41+ 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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Jul 24 — Jul 311
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Washington with Cheapflights
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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 June 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 June 24, 2026.
This CheapOair deal was found by Cheapflights users on 6/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/203:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Fri 7/3112:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/19![Allegiant Air logo]()
$70
This CheapOair deal was found by Cheapflights users on 6/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/203:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Mon 7/2712:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$74
This CheapOair deal was found by Cheapflights users on 6/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/103:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Mon 7/2012:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/20![Allegiant Air logo]()
$76
This CheapOair deal was found by Cheapflights users on 6/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/103:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Fri 7/3112:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/22![Allegiant Air logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/173:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Mon 7/2712:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$82
This Super.com deal was found by Cheapflights users on 6/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/133:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Mon 7/2012:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$84
This Super.com deal was found by Cheapflights users on 6/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/173:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Mon 7/2012:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/173:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Fri 7/2412:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$88
This Priceline deal was found by Cheapflights users on 6/23. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/104:09 pm
BOI
- PDX
Nonstop1h 26m
Alaska Airlines
Wed 11/185:42 pm
PDX
- BOI
Nonstop1h 21m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$177
This CheapOair deal was found by Cheapflights users on 6/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:29 pm
BOI
- PDX
Nonstop1h 21m
Alaska Airlines
Tue 11/105:42 pm
PDX
- BOI
Nonstop1h 21m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$187
This Orbitz deal was found by Cheapflights users on 6/23. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/149:00 am
BOI
- PDX
Nonstop1h 30m
Alaska Airlines
Tue 11/175:42 pm
PDX
- BOI
Nonstop1h 21m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$191
This Alaska Airlines deal was found by Cheapflights users on 6/19. 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.
Wed 10/287:16 am
GEG
- SEA
1 stop8h 01m
Alaska Airlines
Wed 10/285:41 pm
SEA
- GEG
Nonstop1h 11m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$192
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 June 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 June 24, 2026.
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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.
Tue 10/206:00 am
GEG
- SEA
Nonstop1h 20m
Alaska Airlines
Sat 10/248:16 pm
SEA
- GEG
Nonstop1h 09m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 6/19. 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 10/235:40 pm
GEG
- SEA
Nonstop1h 25m
Delta
Mon 11/27:20 am
SEA
- GEG
Nonstop1h 22m
Delta
Deal found 6/19![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/227:05 pm
BOI
- PDX
1 stop6h 45m
United Airlines
Wed 7/298:35 am
PDX
- BOI
1 stop7h 09m
United Airlines
Deal found 6/24![United Airlines logo]()
$243
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:45 pm
BOI
- GEG
1 stop5h 55m
Southwest
Tue 8/1812:35 pm
GEG
- BOI
2 stops8h 40m
Southwest
Deal found 6/21![Southwest logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:37 pm
IDA
- SEA
1 stop16h 23m
Multiple Airlines
Sun 9/137:00 pm
SEA
- IDA
1 stop15h 34m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 6/22. 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 10/2411:53 am
SUN
- SEA
Nonstop1h 56m
Alaska Airlines
Wed 10/288:35 am
SEA
- SUN
Nonstop1h 36m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 6/19. 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.
Thu 7/2312:20 pm
BOI
- GEG
1 stop4h 27m
Delta
Sun 7/267:00 am
GEG
- BOI
1 stop3h 38m
Delta
Deal found 6/19![Delta logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 6/24. 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.
Fri 8/2112:49 pm
GEG
- PDX
Nonstop1h 11m
Alaska Airlines
Mon 8/2410:33 am
PDX
- GEG
Nonstop1h 19m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/222:20 pm
BOI
- SEA
2 stops7h 55m
Southwest
Wed 9/2312:40 pm
SEA
- BOI
2 stops9h 40m
Southwest
Deal found 6/21![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 6/19. 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.
Wed 7/226:51 am
BOI
- GEG
1 stop4h 57m
Delta
Sun 7/2611:30 am
GEG
- BOI
1 stop6h 16m
Delta
Deal found 6/19![Delta logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 6/20. 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.
Tue 10/208:21 am
GEG
- PDX
Nonstop1h 17m
Alaska Airlines
Sat 10/248:36 am
PDX
- GEG
Nonstop1h 10m
Alaska Airlines
Deal found 6/20![Alaska Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/135:55 pm
BOI
- GEG
1 stop8h 30m
Southwest
Thu 7/165:10 pm
GEG
- BOI
1 stop7h 05m
Southwest
Deal found 6/22![Southwest logo]()
$271
This Alaska Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/79:23 pm
BOI
- GEG
Nonstop1h 10m
Alaska Airlines
Wed 8/128:53 am
GEG
- BOI
Nonstop1h 09m
Alaska Airlines
Deal found 6/21![Alaska Airlines logo]()
$227
This Delta deal was found by Cheapflights users on 6/20. 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.
Mon 8/313:29 pm
BOI
- SEA
Nonstop1h 41m
Delta
Tue 9/19:03 am
SEA
- BOI
Nonstop1h 40m
Delta
Deal found 6/20![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 6/20. 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.
Sat 8/17:40 am
BOI
- GEG
Nonstop1h 11m
Alaska Airlines
Sat 8/87:24 pm
GEG
- BOI
Nonstop1h 14m
Alaska Airlines
Deal found 6/20![Alaska Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 6/22. 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 7/286:00 am
BOI
- PDX
2 stops7h 00m
Southwest
Thu 7/306:00 pm
PDX
- BOI
1 stop6h 15m
Southwest
Deal found 6/22![Southwest logo]()
$276
This Delta deal was found by Cheapflights users on 6/23. 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 12/127:55 am
GEG
- SEA
Nonstop1h 31m
Delta
Sat 1/95:35 pm
SEA
- GEG
Nonstop1h 13m
Delta
Deal found 6/23![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 6/19. 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.
Wed 7/157:40 am
BOI
- GEG
Nonstop1h 11m
Alaska Airlines
Sat 7/187:24 pm
GEG
- BOI
Nonstop1h 14m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:55 pm
BOI
- PDX
1 stop3h 35m
Southwest
Wed 7/224:05 pm
PDX
- BOI
2 stops7h 25m
Southwest
Deal found 6/20![Southwest logo]()
$276
This Delta deal was found by Cheapflights users on 6/21. 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.
Thu 7/237:00 am
GEG
- SEA
Nonstop1h 22m
Delta
Thu 7/305:59 pm
SEA
- GEG
Nonstop1h 16m
Delta
Deal found 6/21![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 6/23. 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 7/167:20 pm
BOI
- GEG
1 stop5h 20m
Southwest
Sat 7/185:00 am
GEG
- BOI
2 stops10h 30m
Southwest
Deal found 6/23![Southwest logo]()
$278
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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.
Tue 10/69:09 am
BOI
- PDX
Nonstop1h 24m
Alaska Airlines
Wed 10/75:50 pm
PDX
- BOI
Nonstop1h 28m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 6/23. 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.
Tue 11/247:55 am
GEG
- SEA
Nonstop1h 31m
Delta
Sun 11/297:20 am
SEA
- GEG
Nonstop1h 22m
Delta
Deal found 6/23![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:00 am
BOI
- PDX
1 stop5h 15m
Southwest
Fri 9/46:05 am
PDX
- BOI
1 stop9h 10m
Southwest
Deal found 6/21![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:54 pm
GEG
- SEA
Nonstop1h 25m
Delta
Sat 8/83:46 pm
SEA
- GEG
Nonstop1h 14m
Delta
Deal found 6/24![Delta logo]()
$267
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/238:00 am
JAC
- SEA
1 stop7h 36m
United Airlines
Sun 7/266:00 am
SEA
- JAC
1 stop6h 48m
United Airlines
Deal found 6/22![United Airlines logo]()
$481
This Alaska Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/165:12 am
GEG
- SEA
1 stop3h 12m
Alaska Airlines
Sat 9/197:08 am
SEA
- GEG
1 stop4h 44m
Alaska Airlines
Deal found 6/21![Alaska Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 6/22. 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.
Fri 8/286:00 am
BOI
- GEG
2 stops10h 00m
Southwest
Mon 8/315:35 pm
GEG
- BOI
1 stop4h 15m
Southwest
Deal found 6/22![Southwest logo]()
$295
This Delta deal was found by Cheapflights users on 6/21. 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.
Sun 8/3012:23 pm
BOI
- SEA
Nonstop1h 49m
Delta
Mon 8/312:45 pm
SEA
- BOI
Nonstop1h 34m
Delta
Deal found 6/21![Delta logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:21 pm
GEG
- SEA
1 stop16h 31m
Alaska Airlines
Thu 9/1011:25 am
SEA
- GEG
Nonstop1h 14m
Alaska Airlines
Deal found 6/21![Alaska Airlines logo]()
$257
Last-minute flights from Idaho to WashingtonDiscover last-minute flight deals from Idaho to Washington. Data last updated June 24, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Washington. Data last updated June 24, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 6/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Mon 7/612:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$162
This Alaska Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:27 pm
BOI
- SEA
Nonstop1h 39m
Alaska Airlines
Fri 7/38:25 pm
SEA
- BOI
1 stop23h 18m
Alaska Airlines
Deal found 6/21![Alaska Airlines logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 6/19. 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 7/109:23 pm
BOI
- GEG
Nonstop1h 10m
Alaska Airlines
Sun 7/126:00 am
GEG
- BOI
Nonstop1h 07m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$227
This Expedia deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/169:23 pm
BOI
- GEG
Nonstop1h 10m
Alaska Airlines
Sat 7/187:24 pm
GEG
- BOI
Nonstop1h 14m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$233
This Delta deal was found by Cheapflights users on 6/23. 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.
Thu 7/166:07 pm
BOI
- GEG
1 stop4h 06m
Delta
Mon 7/209:27 am
GEG
- BOI
1 stop6h 57m
Delta
Deal found 6/23![Delta logo]()
$247
This CheapOair deal was found by Cheapflights users on 6/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/189:23 pm
BOI
- GEG
Nonstop1h 10m
Alaska Airlines
Sat 7/257:24 pm
GEG
- BOI
Nonstop1h 14m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$237
This Expedia deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/186:53 pm
BOI
- GEG
Nonstop1h 08m
Alaska Airlines
Mon 7/207:24 pm
GEG
- BOI
Nonstop1h 14m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$238
This Southwest deal was found by Cheapflights users on 6/22. 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 7/2211:45 am
BOI
- PDX
1 stop5h 55m
Southwest
Wed 7/225:55 pm
PDX
- BOI
1 stop5h 35m
Southwest
Deal found 6/22![Southwest logo]()
$243
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/227:05 pm
BOI
- PDX
1 stop6h 45m
United Airlines
Thu 7/2311:16 am
PDX
- BOI
1 stop4h 28m
United Airlines
Deal found 6/22![United Airlines logo]()
$259
This Southwest deal was found by Cheapflights users on 6/22. 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 7/255:40 am
BOI
- GEG
1 stop5h 35m
Southwest
Sat 7/253:15 pm
GEG
- BOI
1 stop7h 20m
Southwest
Deal found 6/22![Southwest logo]()
$245
This Mytrip deal was found by Cheapflights users on 6/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/281:24 pm
BOI
- SEA
1 stop20h 53m
Frontier
Wed 7/2912:35 pm
SEA
- BOI
1 stop22h 54m
Frontier
Deal found 6/22![Frontier logo]()
$242
This Priceline deal was found by Cheapflights users on 6/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:53 pm
BOI
- GEG
Nonstop1h 08m
Alaska Airlines
Sun 8/26:00 am
GEG
- BOI
Nonstop1h 07m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$257
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 June 24, 2026.
Search for one-way flight options from Idaho to Washington. Find affordable one-way fares based on user searches. Data last updated June 24, 2026.
This Super.com deal was found by Cheapflights users on 6/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/103:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/20![Allegiant Air logo]()
$41
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/103:55 pm
IDA
- PDX
Nonstop1h 41m
Allegiant Air
Deal found 6/22![Allegiant Air logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/143:55 pm
IDA
- PDX
Nonstop1h 41m
Allegiant Air
Deal found 6/22![Allegiant Air logo]()
$64
This Super.com deal was found by Cheapflights users on 6/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/243:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$91
This Southwest deal was found by Cheapflights users on 6/24. 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.
Wed 8/1911:30 am
BOI
- SEA
1 stop4h 40m
Southwest
Deal found 6/24![Southwest logo]()
$94
This United Airlines deal was found by Cheapflights users on 6/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:05 pm
BOI
- PDX
1 stop4h 40m
United Airlines
Deal found 6/23![United Airlines logo]()
$94
This Southwest deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
BOI
- PDX
1 stop5h 15m
Southwest
Deal found 6/19![Southwest logo]()
$104
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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.
Wed 8/197:30 am
BOI
- SEA
1 stop3h 18m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$109
This Southwest deal was found by Cheapflights users on 6/23. 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 8/274:55 pm
BOI
- PDX
1 stop7h 20m
Southwest
Deal found 6/23![Southwest logo]()
$109
This Frontier deal was found by Cheapflights users on 6/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:59 pm
BOI
- SEA
1 stop12h 28m
Frontier
Deal found 6/24![Frontier logo]()
$111
This Booking.com deal was found by Cheapflights users on 6/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/41:24 pm
BOI
- SEA
1 stop20h 40m
Frontier
Deal found 6/23![Frontier logo]()
$116
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 June 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $70 (CheapOair) |
One-way from | $41 (Super.com) |
Popular in | June |
Cheapest in | January |
Average price | $327 |
Good round-trip deal | $227 or less |
Good one-way deal | $143 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 June 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
SpokaneSeattle
GEG - SEA
GEGSEA
Spokane
Tue 10/20
6:00 am-7:20 am
Nonstop1h 20m
Seattle/Tacoma Intl
Sat 10/24
8:16 pm-9:25 pm
Nonstop1h 09m
$197
HaileySeattle
SUN - SEA
SUNSEA
Hailey Sun Valley-Friedman
Sat 10/24
11:53 am-12:49 pm
Nonstop1h 56m
Seattle/Tacoma Intl
Wed 10/28
8:35 am-11:11 am
Nonstop1h 36m
$217
SpokanePortland
GEG - PDX
GEGPDX
Spokane
Fri 8/21
12:49 pm-2:00 pm
Nonstop1h 11m
Portland
Mon 8/24
10:33 am-11:52 am
Nonstop1h 19m
$227
SpokanePortland
GEG - PDX
GEGPDX
Spokane
Tue 10/20
8:21 am-9:38 am
Nonstop1h 17m
Portland
Sat 10/24
8:36 am-9:46 am
Nonstop1h 10m
$227
Quickest round-trip
BoiseSpokane
BOI - GEG
BOIGEG
Boise Air Term. Gowen Fld
Fri 8/7
9:23 pm-9:33 pm
Nonstop1h 10m
Spokane
Wed 8/12
8:53 am-11:02 am
Nonstop1h 09m
$227
BoiseSpokane
BOI - GEG
BOIGEG
Boise Air Term. Gowen Fld
Sat 8/1
7:40 am-7:51 am
Nonstop1h 11m
Spokane
Sat 8/8
7:24 pm-9:38 pm
Nonstop1h 14m
$227
BoiseSpokane
BOI - GEG
BOIGEG
Boise Air Term. Gowen Fld
Wed 7/15
7:40 am-7:51 am
Nonstop1h 11m
Spokane
Sat 7/18
7:24 pm-9:38 pm
Nonstop1h 14m
$227
SpokaneSeattle
GEG - SEA
GEGSEA
Spokane
Fri 10/23
5:40 pm-7:05 pm
Nonstop1h 25m
Seattle/Tacoma Intl
Mon 11/2
7:20 am-8:42 am
Nonstop1h 22m
$237
BoisePortland
BOI - PDX
BOIPDX
Boise Air Term. Gowen Fld
Tue 10/6
9:09 am-9:33 am
Nonstop1h 24m
Portland
Wed 10/7
5:50 pm-8:18 pm
Nonstop1h 28m
$237
BoisePortland
BOI - PDX
BOIPDX
Boise Air Term. Gowen Fld
Wed 7/22
7:05 pm-12:50 am
1 stop6h 45m
Portland
Wed 7/29
8:35 am-4:44 pm
1 stop7h 09m
$243
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-PDX
GEG-SEA
BOI-SEA
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
IDA-PDX
BOI-PDX
GEG-SEA
BOI-SEA
What is the cheapest month to book a flight from Idaho to State of Washington?
Currently, March is the cheapest month in which you can book a flight from Idaho to State of Washington (average of $59). Flying from Idaho to State of Washington in July is currently the most expensive (average of $188). 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 June 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 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 June 24, 2026.
The most flights from USID to USWA are scheduled on a Monday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 on average).
How much does it cost to fly round-trip from Idaho to State of Washington?
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 June 20, 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 June 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.
Entertainment
7.0
Overall
7.9
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Overall
7.9
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Overall
7.9
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Overall
7.9
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
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 June 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 2,558,603 searches. Data last updated June 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$247 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$97 | Average$365 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$99 | Average$335 | FlexibilityNo cancel fee | On-time75% |