$76+ 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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Apr 22 — Apr 291
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 March 23, 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 March 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 6/266:39 pm
IDA
- PDX
Nonstop1h 39m
Allegiant Air
Fri 7/1012:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 3/18![Allegiant Air logo]()
$100
This SmartFares deal was found by Cheapflights users on 3/19. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/39:55 am
GEG
- SEA
Nonstop1h 19m
Alaska Airlines
Sun 5/108:15 pm
SEA
- GEG
Nonstop1h 16m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$107
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/256:39 pm
IDA
- PDX
Nonstop1h 41m
Allegiant Air
Fri 5/293:10 pm
PDX
- IDA
Nonstop1h 39m
Allegiant Air
Deal found 3/19![Allegiant Air logo]()
$114
This Trip.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:00 am
BOI
- SEA
Nonstop1h 40m
Alaska Airlines
Sat 5/911:22 am
SEA
- BOI
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$115
This Mytrip deal was found by Cheapflights users on 3/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/266:39 pm
IDA
- PDX
Nonstop1h 39m
Allegiant Air
Mon 6/293:09 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 3/20![Allegiant Air logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 6/226:39 pm
IDA
- PDX
Nonstop1h 39m
Allegiant Air
Mon 6/293:09 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 3/17![Allegiant Air logo]()
$117
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/243:44 pm
BOI
- SEA
Nonstop1h 48m
Delta
Sun 4/265:25 pm
SEA
- BOI
Nonstop1h 35m
Delta
Deal found 3/18![Delta logo]()
$119
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/181:07 pm
GEG
- SEA
Nonstop1h 22m
Delta
Mon 4/209:55 pm
SEA
- GEG
Nonstop1h 20m
Delta
Deal found 3/18![Delta logo]()
$119
This Gotogate deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/63:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Fri 7/1012:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 3/18![Allegiant Air logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Mon 7/612:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 3/20![Allegiant Air logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/226:39 pm
IDA
- PDX
Nonstop1h 41m
Allegiant Air
Fri 5/293:10 pm
PDX
- IDA
Nonstop1h 39m
Allegiant Air
Deal found 3/19![Allegiant Air logo]()
$129
This CheapOair deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/246:08 pm
BOI
- SEA
Nonstop1h 40m
Alaska Airlines
Sat 5/210:06 am
SEA
- BOI
Nonstop1h 29m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$139
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 March 23, 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 March 23, 2026.
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 5/136:10 am
GEG
- SEA
Nonstop1h 30m
Delta
Sat 5/1610:50 pm
SEA
- GEG
Nonstop1h 09m
Delta
Deal found 3/18![Delta logo]()
$119
This Southwest deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 5/28:50 am
BOI
- SEA
2 stops10h 05m
Southwest
Sat 5/99:00 am
SEA
- BOI
1 stop6h 15m
Southwest
Deal found 3/17![Southwest logo]()
$156
This Alaska Airlines deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:50 am
BOI
- PDX
Nonstop1h 24m
Alaska Airlines
Tue 5/59:40 pm
PDX
- BOI
Nonstop1h 19m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$177
This United Airlines deal was found by Cheapflights users on 3/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/207:03 pm
BOI
- PDX
1 stop6h 38m
United Airlines
Mon 4/275:30 am
PDX
- BOI
1 stop4h 36m
United Airlines
Deal found 3/21![United Airlines logo]()
$187
This Delta deal was found by Cheapflights users on 3/19. 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 4/165:40 am
BOI
- SEA
Nonstop1h 48m
Delta
Thu 4/237:50 pm
SEA
- BOI
Nonstop1h 34m
Delta
Deal found 3/19![Delta logo]()
$148
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/145:00 am
GEG
- SEA
Nonstop1h 24m
Delta
Sun 4/267:25 am
SEA
- GEG
Nonstop1h 22m
Delta
Deal found 3/18![Delta logo]()
$158
This Southwest deal was found by Cheapflights users on 3/21. 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.
Thu 4/166:30 am
BOI
- PDX
1 stop10h 50m
Southwest
Mon 4/204:55 pm
PDX
- BOI
1 stop7h 05m
Southwest
Deal found 3/21![Southwest logo]()
$192
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 5/45:40 am
BOI
- SEA
Nonstop1h 48m
Delta
Thu 5/77:35 pm
SEA
- BOI
Nonstop1h 38m
Delta
Deal found 3/18![Delta logo]()
$159
This Alaska Airlines deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/212:40 pm
GEG
- PDX
Nonstop1h 13m
Alaska Airlines
Wed 5/610:30 am
PDX
- GEG
Nonstop1h 16m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 3/22. 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.
Thu 5/77:40 pm
GEG
- PDX
Nonstop1h 13m
Alaska Airlines
Mon 5/1110:30 am
PDX
- GEG
Nonstop1h 16m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:40 pm
BOI
- GEG
1 stop7h 55m
Southwest
Sun 5/315:00 am
GEG
- BOI
1 stop3h 55m
Southwest
Deal found 3/22![Southwest logo]()
$214
This Delta deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:52 pm
BOI
- SEA
Nonstop1h 48m
Delta
Sat 4/257:50 pm
SEA
- BOI
Nonstop1h 34m
Delta
Deal found 3/21![Delta logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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.
Sun 5/35:00 am
GEG
- PDX
1 stop3h 01m
Alaska Airlines
Sun 5/1010:30 am
PDX
- GEG
Nonstop1h 16m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$212
This United Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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.
Sat 5/212:30 pm
BOI
- PDX
1 stop7h 16m
United Airlines
Tue 5/55:30 am
PDX
- BOI
1 stop4h 57m
United Airlines
Deal found 3/18![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 3/21. 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.
Mon 5/119:16 pm
BOI
- SEA
Nonstop1h 49m
Delta
Thu 5/149:00 am
SEA
- BOI
Nonstop1h 35m
Delta
Deal found 3/21![Delta logo]()
$177
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/166:55 pm
BOI
- SEA
1 stop4h 35m
Southwest
Thu 4/237:20 am
SEA
- BOI
1 stop5h 05m
Southwest
Deal found 3/18![Southwest logo]()
$229
This Alaska Airlines deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/302:57 pm
BOI
- PUW
1 stop4h 54m
Alaska Airlines
Mon 5/45:31 pm
PUW
- BOI
Nonstop0h 59m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 3/19. 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.
Sun 5/35:40 am
BOI
- PDX
1 stop5h 18m
Delta
Sun 5/105:51 pm
PDX
- BOI
1 stop3h 22m
Delta
Deal found 3/19![Delta logo]()
$187
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/161:20 pm
BOI
- GEG
1 stop4h 40m
Southwest
Thu 4/2310:45 am
GEG
- BOI
1 stop6h 35m
Southwest
Deal found 3/18![Southwest logo]()
$233
This Alaska Airlines deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:39 pm
BOI
- GEG
Nonstop1h 08m
Alaska Airlines
Tue 5/56:00 am
GEG
- BOI
Nonstop1h 07m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 3/22. 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 5/26:05 am
BOI
- GEG
1 stop5h 20m
Southwest
Sun 5/35:00 am
GEG
- BOI
1 stop3h 55m
Southwest
Deal found 3/22![Southwest logo]()
$237
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:15 am
GEG
- SEA
Nonstop1h 28m
Delta
Tue 4/287:25 am
SEA
- GEG
Nonstop1h 22m
Delta
Deal found 3/22![Delta logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 3/20. 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 5/22:32 pm
BOI
- GEG
Nonstop1h 12m
Alaska Airlines
Sun 5/36:00 am
GEG
- BOI
Nonstop1h 07m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/195:30 am
BOI
- GEG
1 stop6h 05m
Southwest
Sun 4/265:00 am
GEG
- BOI
1 stop3h 55m
Southwest
Deal found 3/21![Southwest logo]()
$237
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:15 am
GEG
- SEA
Nonstop1h 21m
Delta
Sun 4/269:28 am
SEA
- GEG
Nonstop1h 17m
Delta
Deal found 3/22![Delta logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/175:00 am
GEG
- SEA
Nonstop1h 16m
Alaska Airlines
Tue 4/217:49 am
SEA
- GEG
1 stop11h 24m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$222
This Alaska Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/175:00 am
GEG
- PDX
1 stop16h 38m
Alaska Airlines
Fri 4/2410:30 am
PDX
- GEG
Nonstop1h 16m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$222
This Delta deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/105:52 am
BOI
- PDX
1 stop5h 10m
Delta
Fri 4/105:36 pm
PDX
- BOI
1 stop3h 28m
Delta
Deal found 3/17![Delta logo]()
$207
This United Airlines deal was found by Cheapflights users on 3/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/172:35 pm
JAC
- SEA
1 stop7h 31m
United Airlines
Sun 4/265:00 am
SEA
- JAC
1 stop7h 21m
United Airlines
Deal found 3/19![United Airlines logo]()
$413
This Southwest deal was found by Cheapflights users on 3/19. 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 5/206:40 am
BOI
- PDX
2 stops8h 00m
Southwest
Tue 5/2611:15 am
PDX
- BOI
1 stop11h 15m
Southwest
Deal found 3/19![Southwest logo]()
$264
Last-minute flights from Idaho to WashingtonDiscover last-minute flight deals from Idaho to Washington. Data last updated March 23, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Washington. Data last updated March 23, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/114:23 pm
BOI
- PDX
Nonstop1h 22m
Hawaiian Airlines
Sun 4/127:00 am
PDX
- BOI
Nonstop1h 15m
Hawaiian Airlines
Deal found 3/20![Hawaiian Airlines logo]()
$167
This Southwest deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/145:15 pm
BOI
- PDX
1 stop6h 55m
Southwest
Tue 4/215:30 am
PDX
- BOI
1 stop6h 00m
Southwest
Deal found 3/17![Southwest logo]()
$157
This CheapOair deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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.
Tue 4/144:23 pm
BOI
- PDX
Nonstop1h 22m
Alaska Airlines
Tue 4/212:48 pm
PDX
- BOI
Nonstop1h 22m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/153:15 pm
BOI
- PDX
1 stop7h 45m
Southwest
Wed 4/2212:45 pm
PDX
- BOI
2 stops10h 40m
Southwest
Deal found 3/18![Southwest logo]()
$168
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/153:15 pm
BOI
- PDX
1 stop7h 45m
Southwest
Sat 4/187:10 am
PDX
- BOI
1 stop5h 10m
Southwest
Deal found 3/18![Southwest logo]()
$172
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/1611:25 am
GEG
- SEA
Nonstop1h 25m
Delta
Sun 4/197:25 am
SEA
- GEG
Nonstop1h 22m
Delta
Deal found 3/18![Delta logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:00 am
GEG
- SEA
Nonstop1h 16m
Hawaiian Airlines
Mon 4/2010:53 pm
SEA
- GEG
Nonstop1h 06m
Hawaiian Airlines
Deal found 3/20![Hawaiian Airlines logo]()
$187
This Southwest deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/174:20 pm
BOI
- PDX
1 stop7h 20m
Southwest
Sun 4/195:00 am
PDX
- BOI
1 stop3h 55m
Southwest
Deal found 3/17![Southwest logo]()
$187
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/181:07 pm
GEG
- SEA
Nonstop1h 22m
Delta
Mon 4/209:55 pm
SEA
- GEG
Nonstop1h 20m
Delta
Deal found 3/18![Delta logo]()
$119
This Trip.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/196:00 am
GEG
- SEA
Nonstop1h 16m
Alaska Airlines
Sun 4/268:15 pm
SEA
- GEG
Nonstop1h 16m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$189
This CheapOair deal was found by Cheapflights users on 3/19. 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.
Tue 4/215:00 am
GEG
- SEA
Nonstop1h 16m
Alaska Airlines
Wed 5/69:59 pm
SEA
- GEG
Nonstop1h 12m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$139
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/277:38 pm
GEG
- SEA
Nonstop1h 31m
Delta
Tue 4/281:30 pm
SEA
- GEG
Nonstop1h 19m
Delta
Deal found 3/18![Delta logo]()
$159
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 March 23, 2026.
Search for one-way flight options from Idaho to Washington. Find affordable one-way fares based on user searches. Data last updated March 23, 2026.
This Southwest deal was found by Cheapflights users on 3/20. 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.
Tue 6/97:55 pm
BOI
- SEA
1 stop4h 35m
Southwest
Deal found 3/20![Southwest logo]()
$76
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/153:15 pm
BOI
- PDX
1 stop7h 45m
Southwest
Deal found 3/18![Southwest logo]()
$79
This Alaska Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/176:00 am
BOI
- SEA
Nonstop1h 43m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$80
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/176:15 am
GEG
- SEA
Nonstop1h 21m
Delta
Deal found 3/18![Delta logo]()
$80
This Southwest deal was found by Cheapflights users on 3/19. 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 4/87:05 am
BOI
- PDX
1 stop7h 35m
Southwest
Deal found 3/19![Southwest logo]()
$84
This Delta deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/158:59 am
BOI
- SEA
Nonstop1h 54m
Delta
Deal found 3/17![Delta logo]()
$89
This Southwest deal was found by Cheapflights users on 3/20. 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.
Fri 4/177:55 pm
BOI
- PDX
1 stop6h 00m
Southwest
Deal found 3/20![Southwest logo]()
$94
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 5/78:50 am
BOI
- PDX
1 stop9h 35m
Southwest
Deal found 3/18![Southwest logo]()
$99
This Delta deal was found by Cheapflights users on 3/19. 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.
Tue 4/2112:42 pm
SUN
- SEA
1 stop5h 06m
Delta
Deal found 3/19![Delta logo]()
$100
This CheapOair deal was found by Cheapflights users on 3/20. 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.
Sun 4/1911:53 am
BOI
- SEA
1 stop22h 34m
Frontier
Deal found 3/20![Frontier logo]()
$102
This Southwest deal was found by Cheapflights users on 3/20. 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.
Fri 4/246:30 am
BOI
- SEA
1 stop11h 30m
Southwest
Deal found 3/20![Southwest logo]()
$104
This United Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/1612:30 pm
BOI
- PDX
1 stop6h 37m
United Airlines
Deal found 3/18![United Airlines 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 March 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $100 (Kiwi.com) |
One-way from | $76 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $207 |
Good round-trip deal | $187 or less |
Good one-way deal | $108 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 March 23, 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
Wed 5/13
6:10 am-7:40 am
Nonstop1h 30m
Seattle/Tacoma Intl
Sat 5/16
10:50 pm-11:59 pm
Nonstop1h 09m
$119
BoiseSeattle
BOI - SEA
BOISEA
Boise Air Term. Gowen Fld
Thu 4/16
5:40 am-6:28 am
Nonstop1h 48m
Seattle/Tacoma Intl
Thu 4/23
7:50 pm-10:24 pm
Nonstop1h 34m
$148
BoiseSeattle
BOI - SEA
BOISEA
Boise Air Term. Gowen Fld
Sat 5/2
8:50 am-5:55 pm
2 stops10h 05m
Seattle/Tacoma Intl
Sat 5/9
9:00 am-4:15 pm
1 stop6h 15m
$156
SpokaneSeattle
GEG - SEA
GEGSEA
Spokane
Tue 4/14
5:00 am-6:24 am
Nonstop1h 24m
Seattle/Tacoma Intl
Sun 4/26
7:25 am-8:47 am
Nonstop1h 22m
$158
BoiseSeattle
BOI - SEA
BOISEA
Boise Air Term. Gowen Fld
Mon 5/4
5:40 am-6:28 am
Nonstop1h 48m
Seattle/Tacoma Intl
Thu 5/7
7:35 pm-10:13 pm
Nonstop1h 38m
$159
BoisePortland
BOI - PDX
BOIPDX
Boise Air Term. Gowen Fld
Sat 5/2
5:50 am-6:14 am
Nonstop1h 24m
Portland
Tue 5/5
9:40 pm-11:59 pm
Nonstop1h 19m
$177
BoiseSeattle
BOI - SEA
BOISEA
Boise Air Term. Gowen Fld
Sat 4/18
1:52 pm-2:40 pm
Nonstop1h 48m
Seattle/Tacoma Intl
Sat 4/25
7:50 pm-10:24 pm
Nonstop1h 34m
$177
BoiseSeattle
BOI - SEA
BOISEA
Boise Air Term. Gowen Fld
Mon 5/11
9:16 pm-10:05 pm
Nonstop1h 49m
Seattle/Tacoma Intl
Thu 5/14
9:00 am-11:35 am
Nonstop1h 35m
$177
BoisePortland
BOI - PDX
BOIPDX
Boise Air Term. Gowen Fld
Mon 4/20
7:03 pm-12:41 am
1 stop6h 38m
Portland
Mon 4/27
5:30 am-11:06 am
1 stop4h 36m
$187
BoisePortland
BOI - PDX
BOIPDX
Boise Air Term. Gowen Fld
Sun 5/3
5:40 am-9:58 am
1 stop5h 18m
Portland
Sun 5/10
5:51 pm-10:13 pm
1 stop3h 22m
$187
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-SEA
BOI-PDX
GEG-SEA
SUN-SEA
IDA-PDX
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-SEA
BOI-PDX
GEG-SEA
SUN-SEA
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 $79). Flying from Idaho to State of Washington in June is currently the most expensive (average of $137). 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 March 23, 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 in the evening could potentially save you up to 24% on airfare.
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 March 14, 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. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 March 23, 2026.
The most flights from USID to USWA are scheduled on a Friday (46 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (36 on average).
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 March 23, 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
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - 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 March 23, 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 March 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$339 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$99 | Average$287 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$274 | FlexibilityNo cancel fee | On-time85% |