$47+ Cheap flights from California 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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — BOI
May 27 — Jun 31
Round-trip
1 adult, Economy
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Cheapest flights from California to IdahoExplore the most affordable flight options available from California to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 27, 2026.
Explore the most affordable flight options available from California to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 27, 2026.
This Southwest deal was found by Cheapflights users on 4/23. 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.
Sat 5/239:40 am
SAN
- GEG
Nonstop2h 45m
Southwest
Sat 5/3011:05 am
GEG
- SAN
Nonstop2h 40m
Southwest
Deal found 4/23![Southwest logo]()
$92
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 9/88:58 pm
SAN
- GEG
Nonstop2h 54m
Alaska Airlines
Sat 9/126:00 am
GEG
- SAN
Nonstop2h 59m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$93
This Southwest deal was found by Cheapflights users on 4/23. 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.
Mon 6/88:25 am
SAN
- GEG
Nonstop2h 40m
Southwest
Fri 6/1212:55 pm
GEG
- SAN
Nonstop2h 40m
Southwest
Deal found 4/23![Southwest logo]()
$113
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Thu 8/277:58 pm
SAN
- GEG
Nonstop2h 50m
Alaska Airlines
Mon 8/317:00 am
GEG
- SAN
Nonstop2h 54m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$116
This Southwest deal was found by Cheapflights users on 4/23. 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.
Mon 6/88:25 am
SAN
- GEG
Nonstop2h 40m
Southwest
Mon 6/155:00 am
GEG
- SAN
1 stop4h 00m
Southwest
Deal found 4/23![Southwest logo]()
$123
This Southwest deal was found by Cheapflights users on 4/23. 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 6/25:45 pm
SAN
- GEG
1 stop5h 00m
Southwest
Fri 6/512:55 pm
GEG
- SAN
Nonstop2h 40m
Southwest
Deal found 4/23![Southwest logo]()
$125
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Thu 6/46:53 pm
SAN
- GEG
Nonstop2h 52m
Alaska Airlines
Tue 6/97:01 am
GEG
- SAN
Nonstop2h 49m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$133
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Wed 6/36:53 pm
SAN
- GEG
Nonstop2h 52m
Alaska Airlines
Tue 6/97:01 am
GEG
- SAN
Nonstop2h 49m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$136
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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.
Tue 6/27:59 pm
SJC
- BOI
Nonstop1h 44m
Alaska Airlines
Sat 6/610:00 am
BOI
- SJC
Nonstop1h 53m
Alaska Airlines
Deal found 4/22![Alaska Airlines logo]()
$137
This Delta deal was found by Cheapflights users on 4/23. 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 9/81:35 pm
SAN
- GEG
1 stop5h 12m
Delta
Sat 9/129:10 am
GEG
- SAN
1 stop5h 29m
Delta
Deal found 4/23![Delta logo]()
$137
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:53 pm
SAN
- GEG
Nonstop2h 52m
Alaska Airlines
Mon 6/17:01 am
GEG
- SAN
Nonstop2h 49m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$139
This Southwest deal was found by Cheapflights users on 4/27. 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.
Fri 6/58:25 am
SAN
- GEG
Nonstop2h 40m
Southwest
Fri 6/125:10 pm
GEG
- SAN
1 stop5h 30m
Southwest
Deal found 4/27![Southwest logo]()
$143
Best flights from California to IdahoDiscover carefully curated flight deals from California to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 27, 2026.
Discover carefully curated flight deals from California to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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 6/37:59 pm
SJC
- BOI
Nonstop1h 44m
Alaska Airlines
Wed 6/107:37 am
BOI
- SJC
Nonstop1h 55m
Alaska Airlines
Deal found 4/22![Alaska Airlines logo]()
$137
This Delta deal was found by Cheapflights users on 4/23. 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 9/57:00 am
SAN
- GEG
1 stop6h 02m
Delta
Wed 9/95:40 pm
GEG
- SAN
1 stop5h 08m
Delta
Deal found 4/23![Delta logo]()
$137
This Southwest deal was found by Cheapflights users on 4/27. 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.
Mon 6/15:40 pm
SFO
- BOI
1 stop6h 20m
Southwest
Fri 6/55:55 pm
BOI
- SFO
1 stop7h 55m
Southwest
Deal found 4/27![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Thu 5/218:10 am
SFO
- GEG
Nonstop2h 17m
United Airlines
Sun 5/2412:37 pm
GEG
- SFO
Nonstop2h 24m
United Airlines
Deal found 4/25![United Airlines logo]()
$272
This Delta deal was found by Cheapflights users on 4/23. 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.
Fri 5/2911:00 am
SAN
- GEG
1 stop7h 43m
Delta
Sun 5/315:00 am
GEG
- SAN
1 stop7h 42m
Delta
Deal found 4/23![Delta logo]()
$148
This Delta deal was found by Cheapflights users on 4/24. 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.
Wed 7/811:06 am
SAN
- GEG
1 stop5h 50m
Delta
Sat 7/115:41 am
GEG
- SAN
1 stop6h 32m
Delta
Deal found 4/24![Delta logo]()
$153
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Fri 9/118:58 pm
SAN
- GEG
Nonstop2h 54m
Alaska Airlines
Sun 9/135:45 am
GEG
- SAN
1 stop6h 01m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$176
This Delta deal was found by Cheapflights users on 4/25. 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.
Tue 6/234:03 pm
SAN
- GEG
1 stop7h 52m
Delta
Thu 6/257:08 pm
GEG
- SAN
1 stop4h 45m
Delta
Deal found 4/25![Delta logo]()
$153
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Sat 5/237:59 pm
SJC
- BOI
Nonstop1h 44m
Alaska Airlines
Tue 5/266:12 pm
BOI
- SJC
1 stop5h 47m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$187
This Delta deal was found by Cheapflights users on 4/25. 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 5/236:15 am
SAN
- GEG
1 stop5h 46m
Delta
Sat 5/304:59 pm
GEG
- SAN
1 stop4h 56m
Delta
Deal found 4/25![Delta logo]()
$159
This Delta deal was found by Cheapflights users on 4/24. 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.
Wed 5/275:50 pm
ONT
- BOI
1 stop5h 05m
Delta
Tue 6/26:41 pm
BOI
- ONT
1 stop5h 53m
Delta
Deal found 4/24![Delta logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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 5/267:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Wed 6/34:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 4/27. 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 7/305:00 pm
SAN
- GEG
2 stops7h 30m
Southwest
Sat 8/83:15 pm
GEG
- SAN
1 stop4h 15m
Southwest
Deal found 4/27![Southwest logo]()
$255
This United Airlines deal was found by Cheapflights users on 4/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:00 am
ONT
- BOI
1 stop6h 08m
United Airlines
Mon 6/17:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 4/26![United Airlines logo]()
$283
This Southwest deal was found by Cheapflights users on 4/24. 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 5/272:50 pm
SFO
- BOI
1 stop7h 40m
Southwest
Sat 5/301:55 pm
BOI
- SFO
2 stops8h 25m
Southwest
Deal found 4/24![Southwest logo]()
$262
This Delta deal was found by Cheapflights users on 4/22. 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 6/32:51 pm
SJC
- BOI
1 stop4h 41m
Delta
Sun 6/77:00 am
BOI
- SJC
1 stop4h 43m
Delta
Deal found 4/22![Delta logo]()
$191
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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 5/267:00 am
LAX
- BOI
1 stop7h 34m
Alaska Airlines
Tue 6/27:33 pm
BOI
- LAX
Nonstop2h 24m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$232
This Southwest deal was found by Cheapflights users on 4/23. 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.
Mon 6/17:50 pm
LAX
- BOI
1 stop4h 10m
Southwest
Tue 6/24:05 pm
BOI
- LAX
2 stops7h 25m
Southwest
Deal found 4/23![Southwest logo]()
$263
This United Airlines deal was found by Cheapflights users on 4/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/119:27 pm
SFO
- GEG
Nonstop2h 24m
United Airlines
Sat 6/206:00 am
GEG
- SFO
Nonstop2h 28m
United Airlines
Deal found 4/26![United Airlines logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Wed 6/37:00 am
SAN
- GEG
1 stop4h 52m
Alaska Airlines
Sat 6/138:15 am
GEG
- SAN
Nonstop2h 48m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$235
This Delta deal was found by Cheapflights users on 4/24. 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.
Wed 6/35:50 pm
ONT
- BOI
1 stop5h 03m
Delta
Sun 6/76:08 pm
BOI
- ONT
1 stop5h 33m
Delta
Deal found 4/24![Delta logo]()
$197
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Tue 6/168:59 pm
SFO
- BOI
Nonstop1h 56m
United Airlines
Sun 6/216:30 am
BOI
- SFO
Nonstop2h 00m
United Airlines
Deal found 4/24![United Airlines logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:58 pm
SAN
- GEG
Nonstop2h 50m
Alaska Airlines
Sun 9/612:46 pm
GEG
- SAN
1 stop7h 38m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$236
This Southwest deal was found by Cheapflights users on 4/25. 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.
Mon 5/253:40 pm
SFO
- GEG
2 stops8h 50m
Southwest
Sat 5/301:45 pm
GEG
- SFO
1 stop4h 50m
Southwest
Deal found 4/25![Southwest logo]()
$289
This United Airlines deal was found by Cheapflights users on 4/24. 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 6/178:10 am
SFO
- GEG
Nonstop2h 17m
United Airlines
Sun 6/216:00 am
GEG
- SFO
Nonstop2h 28m
United Airlines
Deal found 4/24![United Airlines logo]()
$313
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Sun 5/247:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Wed 6/34:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 4/24. 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 5/263:55 pm
SFO
- BOI
2 stops7h 30m
Southwest
Tue 6/25:00 pm
BOI
- SFO
2 stops6h 05m
Southwest
Deal found 4/24![Southwest logo]()
$292
This Delta deal was found by Cheapflights users on 4/26. 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 6/57:00 pm
SFO
- BOI
1 stop4h 04m
Delta
Mon 6/86:42 pm
BOI
- SFO
1 stop4h 23m
Delta
Deal found 4/26![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 6/27:59 pm
SJC
- BOI
Nonstop1h 44m
Alaska Airlines
Wed 6/37:00 am
BOI
- SJC
2 stops13h 22m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$241
This Southwest deal was found by Cheapflights users on 4/23. 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 6/186:30 pm
ONT
- BOI
1 stop4h 45m
Southwest
Mon 6/227:40 pm
BOI
- ONT
1 stop4h 50m
Southwest
Deal found 4/23![Southwest logo]()
$297
Last-minute flights from California to IdahoDiscover last-minute flight deals from California to Idaho. Data last updated April 27, 2026 and is based on user searches.
Discover last-minute flight deals from California to Idaho. Data last updated April 27, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 5/133:05 pm
SFO
- BOI
Nonstop1h 38m
Alaska Airlines
Sat 5/166:54 pm
BOI
- SFO
Nonstop1h 49m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$176
This Delta deal was found by Cheapflights users on 4/23. 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 5/143:45 pm
SAN
- GEG
1 stop7h 06m
Delta
Mon 5/184:13 pm
GEG
- SAN
1 stop7h 02m
Delta
Deal found 4/23![Delta logo]()
$137
This Delta deal was found by Cheapflights users on 4/25. 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.
Mon 5/183:45 pm
SAN
- GEG
1 stop7h 06m
Delta
Mon 6/87:08 pm
GEG
- SAN
1 stop4h 45m
Delta
Deal found 4/25![Delta logo]()
$156
This Southwest deal was found by Cheapflights users on 4/26. 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.
Tue 5/194:30 pm
SAN
- GEG
1 stop6h 15m
Southwest
Sat 5/2311:05 am
GEG
- SAN
Nonstop2h 40m
Southwest
Deal found 4/26![Southwest logo]()
$149
This Delta deal was found by Cheapflights users on 4/23. 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.
Fri 5/2210:59 am
SAN
- GEG
1 stop4h 34m
Delta
Mon 5/255:00 am
GEG
- SAN
1 stop5h 05m
Delta
Deal found 4/23![Delta logo]()
$159
This Southwest deal was found by Cheapflights users on 4/23. 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.
Sat 5/239:40 am
SAN
- GEG
Nonstop2h 45m
Southwest
Sat 5/3011:05 am
GEG
- SAN
Nonstop2h 40m
Southwest
Deal found 4/23![Southwest logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/256:30 am
LAX
- BOI
1 stop29h 00m
Frontier
Tue 6/21:25 pm
BOI
- LAX
1 stop11h 51m
Frontier
Deal found 4/23![Frontier logo]()
$163
This Delta deal was found by Cheapflights users on 4/23. 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 5/266:00 am
ONT
- BOI
1 stop4h 56m
Delta
Wed 6/36:00 pm
BOI
- ONT
1 stop5h 32m
Delta
Deal found 4/23![Delta logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 5/276:53 pm
SAN
- GEG
Nonstop2h 52m
Alaska Airlines
Sun 5/317:01 am
GEG
- SAN
Nonstop2h 49m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$116
This Delta deal was found by Cheapflights users on 4/23. 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 5/273:45 pm
SAN
- GEG
1 stop7h 06m
Delta
Sun 5/316:10 am
GEG
- SAN
1 stop6h 32m
Delta
Deal found 4/23![Delta logo]()
$148
This Expedia deal was found by Cheapflights users on 4/23. 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 5/286:53 pm
SAN
- GEG
Nonstop2h 52m
Alaska Airlines
Tue 6/27:01 am
GEG
- SAN
Nonstop2h 49m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$93
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:53 pm
SAN
- GEG
Nonstop2h 52m
Alaska Airlines
Mon 6/17:01 am
GEG
- SAN
Nonstop2h 49m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$139
One-way flights from California to IdahoSearch for one-way flight options from California to Idaho. Find affordable one-way fares based on user searches. Data last updated April 27, 2026.
Search for one-way flight options from California to Idaho. Find affordable one-way fares based on user searches. Data last updated April 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Sat 5/236:53 pm
SAN
- GEG
Nonstop2h 52m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$47
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 5/196:53 pm
SAN
- GEG
Nonstop2h 52m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$66
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 7/288:22 pm
SAN
- GEG
Nonstop2h 45m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$67
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Sat 5/237:59 pm
SJC
- BOI
Nonstop1h 44m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$69
This Delta deal was found by Cheapflights users on 4/23. 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 8/263:20 pm
SAN
- GEG
1 stop5h 44m
Delta
Deal found 4/23![Delta logo]()
$69
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Thu 10/228:59 pm
SAN
- GEG
Nonstop2h 48m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$70
This Delta deal was found by Cheapflights users on 4/23. 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.
Mon 8/34:11 pm
SAN
- GEG
1 stop5h 02m
Delta
Deal found 4/23![Delta logo]()
$77
This Delta deal was found by Cheapflights users on 4/23. 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 5/197:00 am
SJC
- BOI
1 stop6h 34m
Delta
Deal found 4/23![Delta logo]()
$78
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Fri 5/291:54 pm
SFO
- BOI
Nonstop1h 50m
United Airlines
Deal found 4/23![United Airlines logo]()
$79
This Delta deal was found by Cheapflights users on 4/23. 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 10/227:00 am
SAN
- GEG
1 stop7h 45m
Delta
Deal found 4/23![Delta logo]()
$80
This Southwest deal was found by Cheapflights users on 4/23. 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 6/23:45 pm
ONT
- BOI
1 stop6h 45m
Southwest
Deal found 4/23![Southwest logo]()
$84
This Delta deal was found by Cheapflights users on 4/23. 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 5/195:40 am
SFO
- BOI
1 stop5h 16m
Delta
Deal found 4/23![Delta logo]()
$89
Find flight deals from California to Idaho
Keep the following information in mind while searching for California to Idaho flight deals. Data was last updated April 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $92 (Southwest) |
One-way from | $47 (Alaska Airlines) |
Popular in | February |
Cheapest in | April |
Average price | $236 |
Good round-trip deal | $157 or less |
Good one-way deal | $37 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from California 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 April 27, 2026.
Use the filters below to find and compare flights from California to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
San JoseBoise
SJC - BOI
SJCBOI
San Jose
Wed 6/3
7:59 pm-10:43 pm
Nonstop1h 44m
Boise Air Term. Gowen Fld
Wed 6/10
7:37 am-8:32 am
Nonstop1h 55m
$137
San DiegoSpokane
SAN - GEG
SANGEG
San Diego
Sat 9/5
7:00 am-1:02 pm
1 stop6h 02m
Spokane
Wed 9/9
5:40 pm-10:48 pm
1 stop5h 08m
$137
San DiegoSpokane
SAN - GEG
SANGEG
San Diego
Fri 5/29
11:00 am-6:43 pm
1 stop7h 43m
Spokane
Sun 5/31
5:00 am-12:42 pm
1 stop7h 42m
$148
San DiegoSpokane
SAN - GEG
SANGEG
San Diego
Wed 7/8
11:06 am-4:56 pm
1 stop5h 50m
Spokane
Sat 7/11
5:41 am-12:13 pm
1 stop6h 32m
$153
San DiegoSpokane
SAN - GEG
SANGEG
San Diego
Tue 6/23
4:03 pm-11:55 pm
1 stop7h 52m
Spokane
Thu 6/25
7:08 pm-11:53 pm
1 stop4h 45m
$153
San DiegoSpokane
SAN - GEG
SANGEG
San Diego
Sat 5/23
6:15 am-12:01 pm
1 stop5h 46m
Spokane
Sat 5/30
4:59 pm-9:55 pm
1 stop4h 56m
$159
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 5/27
5:50 pm-11:55 pm
1 stop5h 05m
Boise Air Term. Gowen Fld
Tue 6/2
6:41 pm-11:34 pm
1 stop5h 53m
$167
San DiegoSpokane
SAN - GEG
SANGEG
San Diego
Fri 9/11
8:58 pm-11:52 pm
Nonstop2h 54m
Spokane
Sun 9/13
5:45 am-11:46 am
1 stop6h 01m
$176
San JoseBoise
SJC - BOI
SJCBOI
San Jose
Sat 5/23
7:59 pm-10:43 pm
Nonstop1h 44m
Boise Air Term. Gowen Fld
Tue 5/26
6:12 pm-10:59 pm
1 stop5h 47m
$187
San JoseBoise
SJC - BOI
SJCBOI
San Jose
Wed 6/3
2:51 pm-8:32 pm
1 stop4h 41m
Boise Air Term. Gowen Fld
Sun 6/7
7:00 am-10:43 am
1 stop4h 43m
$191
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from California to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from California with our price prediction graph.
SAN-GEG
SJC-BOI
SFO-BOI
ONT-BOI
SFO-GEG
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 California to Idaho
USCA-USID
SAN-GEG
SJC-BOI
SFO-BOI
ONT-BOI
How far ahead should I book a flight from California to Idaho?
The best time to book flights from California to Idaho is 81 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from California to Idaho?
Currently, October is the cheapest month in which you can book a flight from California to Idaho (average of $302). Flying from California to Idaho in March is currently the most expensive (average of $461). 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 CA to ID?
Find hourly flight availability from California 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 April 27, 2026.
A simple way to save on the total cost of your ticket is to fly from California to Idaho at noon. If you’re flexible enough to do this you can expect to save up to 19% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from California to Idaho?
Use this chart to determine the cheapest time to fly round-trip from California to Idaho. Price data was last updated on April 25, 2026.
Travelers seeking maximum savings on their California to Idaho flight should consider departing on Friday at noon when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from California to Idaho
Explore weekly flight availability from California 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 April 27, 2026.
The most flights from USCA to USID are scheduled on a Friday (25 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (18 on average).
How much does it cost to fly round-trip from California to Idaho?
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 April 27, 2026.
Peruse reviews from past customers who have flown with Southwest,Alaska Airlines, andDelta from California to Idaho to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from California to Idaho. 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
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for California 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 California to Idaho by cabin class
Find flights from California to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
California and Idaho flights
Browse other California and Idaho flight options. Last updated on April 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 California after your stay in Idaho
California to Idaho flights
Consider these flights traveling from California to Idaho.
Top 9 airlines flying from California to Idaho
Discover the top 9 airlines that operate flights from California 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 April 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$78 | Average$232 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$78 | Average$146 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$95 | Average$197 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$95 | Average$210 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$97 | Average$343 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$118 | Average$430 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$129 | Average$391 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$147 | Average$321 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$357 | Average$567 | FlexibilityNo cancel fee | On-time71% |