$41+ Cheap flights from Washington to Idaho
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.
SEA — BOI
Jul 27 — Aug 31
Round-trip
1 adult, Economy
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Cheapest flights from Washington to IdahoExplore the most affordable flight options available from Washington to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 27, 2026.
Explore the most affordable flight options available from Washington to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 27, 2026.
This Super.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/1712:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Mon 7/203:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/25![Allegiant Air logo]()
$94
This Trip.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Fri 8/73:55 pm
IDA
- PDX
Nonstop1h 41m
Allegiant Air
Deal found 6/25![Allegiant Air logo]()
$97
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 7/2412:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Mon 7/273:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$99
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:25 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Fri 8/143:55 pm
IDA
- PDX
Nonstop1h 41m
Allegiant Air
Deal found 6/24![Allegiant Air logo]()
$103
This Booking.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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.
Mon 7/2712:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Fri 7/313:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/25![Allegiant Air logo]()
$109
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.
Tue 10/1310:45 am
PDX
- BOI
Nonstop1h 29m
Alaska Airlines
Wed 10/215:56 am
BOI
- PDX
Nonstop1h 24m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 8/209:20 pm
SEA
- BOI
Nonstop1h 33m
Delta
Wed 8/2610:35 am
BOI
- SEA
Nonstop1h 53m
Delta
Deal found 6/25![Delta logo]()
$182
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:00 am
SEA
- BOI
Nonstop1h 36m
Alaska Airlines
Sun 8/237:48 pm
BOI
- SEA
Nonstop1h 34m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$186
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.
Wed 8/191:45 pm
SEA
- BOI
1 stop8h 35m
Southwest
Sat 8/221:50 pm
BOI
- SEA
1 stop6h 45m
Southwest
Deal found 6/23![Southwest logo]()
$187
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.
Sat 10/102:45 pm
PDX
- BOI
Nonstop1h 22m
Alaska Airlines
Sun 10/185:56 am
BOI
- PDX
Nonstop1h 24m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$187
This Trip.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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.
Thu 8/206:03 pm
SEA
- BOI
Nonstop1h 30m
Alaska Airlines
Sun 8/237:48 pm
BOI
- SEA
Nonstop1h 34m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$194
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 8/202:45 pm
SEA
- BOI
Nonstop1h 34m
Delta
Sun 8/2310:35 am
BOI
- SEA
Nonstop1h 53m
Delta
Deal found 6/25![Delta logo]()
$196
Best flights from Washington to IdahoDiscover carefully curated flight deals from Washington to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 27, 2026.
Discover carefully curated flight deals from Washington to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 27, 2026.
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.
Thu 10/19:18 pm
SEA
- BOI
Nonstop1h 26m
Alaska Airlines
Mon 10/52:08 pm
BOI
- SEA
Nonstop1h 38m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$197
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.
Wed 8/1911:22 am
PDX
- BOI
1 stop4h 57m
Delta
Sat 8/295:59 pm
BOI
- PDX
1 stop5h 39m
Delta
Deal found 6/23![Delta logo]()
$207
This Southwest deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 9/49:10 am
SEA
- BOI
1 stop10h 30m
Southwest
Sun 9/1311:15 am
BOI
- SEA
1 stop4h 45m
Southwest
Deal found 6/25![Southwest logo]()
$222
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.
Sat 9/127:00 am
SEA
- BOI
1 stop7h 31m
United Airlines
Wed 9/165:40 pm
BOI
- SEA
1 stop6h 24m
United Airlines
Deal found 6/23![United Airlines logo]()
$257
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 10/1010:17 am
SEA
- GEG
Nonstop1h 22m
Alaska Airlines
Tue 10/137:43 pm
GEG
- SEA
Nonstop1h 17m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 10/169:25 pm
SEA
- BOI
Nonstop1h 27m
Delta
Sun 10/182:35 pm
BOI
- SEA
Nonstop1h 50m
Delta
Deal found 6/26![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 9/276:55 am
SEA
- BOI
1 stop6h 50m
Southwest
Tue 9/2911:30 am
BOI
- SEA
1 stop4h 40m
Southwest
Deal found 6/26![Southwest logo]()
$227
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.
Sat 8/2210:33 am
PDX
- GEG
Nonstop1h 19m
Alaska Airlines
Sat 8/2912:49 pm
GEG
- PDX
Nonstop1h 11m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$207
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 8/277:15 am
SEA
- GEG
Nonstop1h 19m
Delta
Sun 8/301:00 pm
GEG
- SEA
Nonstop1h 27m
Delta
Deal found 6/25![Delta logo]()
$217
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 8/2910:33 am
PDX
- GEG
Nonstop1h 19m
Alaska Airlines
Wed 9/27:24 pm
GEG
- PDX
Nonstop1h 12m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 8/206:25 am
PDX
- BOI
1 stop6h 50m
Southwest
Thu 8/204:55 pm
BOI
- PDX
1 stop7h 20m
Southwest
Deal found 6/27![Southwest logo]()
$237
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/195:30 am
PDX
- BOI
1 stop3h 25m
Delta
Sun 8/236:49 am
BOI
- PDX
1 stop5h 56m
Delta
Deal found 6/22![Delta logo]()
$222
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.
Wed 10/218:37 am
SEA
- BOI
1 stop3h 37m
Alaska Airlines
Sat 10/241:29 pm
BOI
- SEA
1 stop6h 27m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$217
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/101:30 pm
SEA
- GEG
Nonstop1h 15m
Delta
Sun 10/117:55 am
GEG
- SEA
Nonstop1h 31m
Delta
Deal found 6/22![Delta logo]()
$227
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.
Tue 8/115:45 am
GEG
- BOI
1 stop7h 05m
Southwest
Tue 8/182:20 pm
BOI
- GEG
2 stops8h 20m
Southwest
Deal found 6/24![Southwest logo]()
$252
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.
Thu 7/168:35 am
PDX
- BOI
1 stop7h 09m
United Airlines
Mon 7/207:05 pm
BOI
- PDX
1 stop6h 45m
United Airlines
Deal found 6/24![United Airlines logo]()
$313
This Alaska Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:51 pm
SEA
- BOI
Nonstop1h 26m
Alaska Airlines
Sun 10/184:19 pm
BOI
- SEA
Nonstop1h 41m
Alaska Airlines
Deal found 6/27![Alaska Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 8/221:57 pm
SEA
- GEG
Nonstop1h 22m
Delta
Sun 8/231:00 pm
GEG
- SEA
Nonstop1h 27m
Delta
Deal found 6/27![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:15 pm
GEG
- BOI
1 stop7h 50m
Southwest
Wed 11/116:15 am
BOI
- GEG
2 stops8h 20m
Southwest
Deal found 6/27![Southwest logo]()
$252
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.
Wed 8/199:33 pm
PDX
- BOI
Nonstop1h 22m
Alaska Airlines
Sun 8/236:00 am
BOI
- PDX
Nonstop1h 20m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$217
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.
Thu 8/203:25 pm
SEA
- BOI
1 stop6h 25m
Southwest
Sun 8/236:00 am
BOI
- SEA
1 stop7h 05m
Southwest
Deal found 6/24![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 8/15:40 pm
GEG
- BOI
1 stop3h 38m
Delta
Mon 8/33:29 pm
BOI
- GEG
1 stop6h 47m
Delta
Deal found 6/25![Delta logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 8/297:00 am
GEG
- BOI
Nonstop1h 09m
Alaska Airlines
Tue 9/14:12 pm
BOI
- GEG
Nonstop1h 08m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$227
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 10/278:33 am
SEA
- JAC
1 stop6h 10m
United Airlines
Fri 10/304:25 pm
JAC
- SEA
1 stop5h 58m
United Airlines
Deal found 6/25![United Airlines logo]()
$372
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/235:37 pm
GEG
- BOI
1 stop5h 14m
Delta
Sat 7/258:42 am
BOI
- GEG
1 stop4h 59m
Delta
Deal found 6/25![Delta logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/317:24 pm
GEG
- BOI
Nonstop1h 14m
Alaska Airlines
Tue 8/42:47 pm
BOI
- GEG
Nonstop1h 08m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 8/14:25 pm
PDX
- BOI
1 stop7h 05m
Southwest
Tue 8/42:20 pm
BOI
- PDX
2 stops6h 30m
Southwest
Deal found 6/27![Southwest logo]()
$297
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:00 am
GEG
- BOI
1 stop3h 38m
Delta
Tue 7/217:28 pm
BOI
- GEG
1 stop5h 27m
Delta
Deal found 6/22![Delta logo]()
$247
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 9/128:41 am
SEA
- BOI
1 stop10h 39m
Alaska Airlines
Wed 9/164:20 pm
BOI
- SEA
Nonstop1h 36m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$240
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 11/175:00 am
PDX
- JAC
1 stop7h 29m
United Airlines
Wed 11/1810:51 am
JAC
- PDX
2 stops8h 38m
United Airlines
Deal found 6/23![United Airlines logo]()
$427
Last-minute flights from Washington to IdahoDiscover last-minute flight deals from Washington to Idaho. Data last updated June 27, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Idaho. Data last updated June 27, 2026 and is based on user searches.
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:50 pm
SEA
- GEG
Nonstop1h 06m
Alaska Airlines
Sun 7/196:13 am
GEG
- SEA
Nonstop1h 11m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$239
This Super.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/1712:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Mon 7/203:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/25![Allegiant Air logo]()
$94
This Mytrip deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 7/176:00 am
GEG
- BOI
Nonstop1h 07m
Alaska Airlines
Sat 7/187:40 am
BOI
- GEG
Nonstop1h 11m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$236
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.
Tue 7/215:55 pm
PDX
- BOI
1 stop5h 35m
Southwest
Tue 7/284:20 pm
BOI
- PDX
1 stop8h 50m
Southwest
Deal found 6/23![Southwest logo]()
$243
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.
Thu 7/237:24 pm
GEG
- BOI
Nonstop1h 14m
Alaska Airlines
Mon 7/279:23 pm
BOI
- GEG
Nonstop1h 10m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$227
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 7/235:37 pm
GEG
- BOI
1 stop5h 14m
Delta
Sat 7/258:42 am
BOI
- GEG
1 stop4h 59m
Delta
Deal found 6/23![Delta logo]()
$247
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 7/2412:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Mon 7/273:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$99
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 7/244:05 pm
GEG
- BOI
Nonstop1h 08m
Alaska Airlines
Sat 7/259:23 pm
BOI
- GEG
Nonstop1h 10m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$235
This Expedia deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 7/254:05 pm
GEG
- BOI
Nonstop1h 08m
Alaska Airlines
Sat 8/19:23 pm
BOI
- GEG
Nonstop1h 10m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$239
This Booking.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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.
Mon 7/2712:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Fri 7/313:50 pm
IDA
- PDX
Nonstop1h 36m
Allegiant Air
Deal found 6/25![Allegiant Air logo]()
$109
This CheapOair deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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.
Wed 7/296:00 am
GEG
- BOI
Nonstop1h 07m
Alaska Airlines
Mon 8/36:53 pm
BOI
- GEG
Nonstop1h 08m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$237
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 7/3112:20 pm
PDX
- IDA
Nonstop1h 40m
Multiple Airlines
Mon 8/310:47 pm
IDA
- PDX
3 stops42h 49m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$232
One-way flights from Washington to IdahoSearch for one-way flight options from Washington to Idaho. Find affordable one-way fares based on user searches. Data last updated June 27, 2026.
Search for one-way flight options from Washington to Idaho. Find affordable one-way fares based on user searches. Data last updated June 27, 2026.
This Super.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 7/1012:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/26![Allegiant Air logo]()
$41
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3112:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$45
This Super.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/1712:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/25![Allegiant Air logo]()
$50
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:25 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$59
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 7/312:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/24![Allegiant Air logo]()
$79
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1412:25 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$81
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.
Mon 7/612:20 pm
PDX
- IDA
Nonstop1h 40m
Allegiant Air
Deal found 6/24![Allegiant Air logo]()
$94
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 8/197:11 am
SEA
- BOI
1 stop7h 20m
United Airlines
Deal found 6/25![United Airlines 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.
Sat 8/229:00 am
PDX
- BOI
1 stop5h 31m
United Airlines
Deal found 6/23![United Airlines logo]()
$94
This Southwest deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 9/2312:40 pm
SEA
- BOI
2 stops9h 40m
Southwest
Deal found 6/25![Southwest logo]()
$99
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.
Mon 8/247:00 am
PDX
- BOI
1 stop7h 31m
United Airlines
Deal found 6/23![United Airlines logo]()
$104
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.
Fri 8/211:55 pm
SEA
- BOI
1 stop7h 40m
Southwest
Deal found 6/23![Southwest logo]()
$109
Find flight deals from Washington to Idaho
Keep the following information in mind while searching for Washington to Idaho flight deals. Data was last updated June 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $94 (Super.com) |
One-way from | $41 (Super.com) |
Popular in | June |
Cheapest in | January |
Average price | $311 |
Good round-trip deal | $287 or less |
Good one-way deal | $143 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to Idaho 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 27, 2026.
Use the filters below to find and compare flights from Washington to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleBoise
SEA - BOI
SEABOI
Seattle/Tacoma Intl
Thu 10/1
9:18 pm-11:44 pm
Nonstop1h 26m
Boise Air Term. Gowen Fld
Mon 10/5
2:08 pm-2:46 pm
Nonstop1h 38m
$197
SeattleSpokane
SEA - GEG
SEAGEG
Seattle/Tacoma Intl
Sat 10/10
10:17 am-11:39 am
Nonstop1h 22m
Spokane
Tue 10/13
7:43 pm-9:00 pm
Nonstop1h 17m
$197
PortlandBoise
PDX - BOI
PDXBOI
Portland
Wed 8/19
11:22 am-5:19 pm
1 stop4h 57m
Boise Air Term. Gowen Fld
Sat 8/29
5:59 pm-10:38 pm
1 stop5h 39m
$207
PortlandSpokane
PDX - GEG
PDXGEG
Portland
Sat 8/22
10:33 am-11:52 am
Nonstop1h 19m
Spokane
Sat 8/29
12:49 pm-2:00 pm
Nonstop1h 11m
$207
PortlandSpokane
PDX - GEG
PDXGEG
Portland
Sat 8/29
10:33 am-11:52 am
Nonstop1h 19m
Spokane
Wed 9/2
7:24 pm-8:36 pm
Nonstop1h 12m
$207
SeattleBoise
SEA - BOI
SEABOI
Seattle/Tacoma Intl
Fri 10/16
9:25 pm-11:52 pm
Nonstop1h 27m
Boise Air Term. Gowen Fld
Sun 10/18
2:35 pm-3:25 pm
Nonstop1h 50m
$217
SeattleSpokane
SEA - GEG
SEAGEG
Seattle/Tacoma Intl
Thu 8/27
7:15 am-8:34 am
Nonstop1h 19m
Spokane
Sun 8/30
1:00 pm-2:27 pm
Nonstop1h 27m
$217
SeattleBoise
SEA - BOI
SEABOI
Seattle/Tacoma Intl
Wed 10/21
8:37 am-1:14 pm
1 stop3h 37m
Boise Air Term. Gowen Fld
Sat 10/24
1:29 pm-6:56 pm
1 stop6h 27m
$217
SeattleBoise
SEA - BOI
SEABOI
Seattle/Tacoma Intl
Fri 10/16
3:51 pm-6:17 pm
Nonstop1h 26m
Boise Air Term. Gowen Fld
Sun 10/18
4:19 pm-5:00 pm
Nonstop1h 41m
$217
PortlandBoise
PDX - BOI
PDXBOI
Portland
Wed 8/19
9:33 pm-11:55 pm
Nonstop1h 22m
Boise Air Term. Gowen Fld
Sun 8/23
6:00 am-6:20 am
Nonstop1h 20m
$217
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Washington with our price prediction graph.
PDX-IDA
GEG-BOI
SEA-GEG
PDX-BOI
SEA-BOI
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 Washington to Idaho
USWA-USID
PDX-IDA
GEG-BOI
SEA-GEG
PDX-BOI
What is the cheapest month to book a flight from State of Washington to Idaho?
Currently, September is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $59). Flying from State of Washington to Idaho in July is currently the most expensive (average of $184). 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 WA to ID?
Find hourly flight availability from Washington to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 27, 2026.
It’s optimal to fly from State of Washington to Idaho in the morning. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the evening.
Weekly flight availability from State of Washington to Idaho
Explore weekly flight availability from Washington to Idaho. 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 27, 2026.
The most flights from USWA to USID are scheduled on a Friday (47 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (27 on average).
How much does it cost to fly round-trip from State of Washington to Idaho?
How far ahead should I book a flight from State of Washington to Idaho?
The price you pay for your flight from State of Washington to Idaho may vary depending on when you book. For the best chance of a lower fare, look to book 61 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 State of Washington to Idaho?
Use this chart to determine the cheapest time to fly round-trip from Washington to Idaho. Price data was last updated on June 20, 2026.
Travelers seeking maximum savings on their State of Washington to Idaho flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Idaho
Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated June 27, 2026.
Read through reviews of airlines operating flights from Washington to Idaho, such as Alaska Airlines,Delta, andHawaiian Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Related info for your journey
Find useful and relevant information for your journey from Washington to Idaho. 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 Washington to Idaho
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Idaho by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Washington to Idaho by cabin class
Find flights from Washington to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Washington and Idaho flights
Browse other Washington and Idaho flight options. Last updated on June 27, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Idaho
Find the right flight back to Washington after your stay in Idaho
Washington to Idaho flights
Consider these flights traveling from Washington to Idaho.
Top 3 airlines flying from Washington to Idaho
Discover the top 3 airlines that operate flights from Washington to Idaho. 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 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$428 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$104 | Average$298 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$108 | Average$272 | FlexibilityNo cancel fee | On-time85% |