$120+ Cheap flights from Philadelphia (PHL) 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Apr 12 — Apr 191
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Idaho with Cheapflights
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Cheapest flights from Philadelphia to IdahoExplore the most affordable flight options available from Philadelphia to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2026.
Explore the most affordable flight options available from Philadelphia to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2026.
This Frontier deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:41 pm
PHL
- GEG
1 stop17h 08m
Frontier
Sun 4/2611:44 am
GEG
- PHL
1 stop14h 50m
Frontier
Deal found 3/9![Frontier logo]()
$200
This Southwest deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:35 am
PHL
- GEG
1 stop7h 30m
Southwest
Wed 4/221:45 pm
GEG
- PHL
1 stop7h 10m
Southwest
Deal found 3/10![Southwest logo]()
$297
This Delta deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:54 pm
PHL
- GEG
1 stop7h 40m
Delta
Tue 4/212:10 pm
GEG
- PHL
1 stop6h 48m
Delta
Deal found 3/10![Delta logo]()
$317
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/52:59 pm
PHL
- BOI
1 stop7h 30m
Delta
Tue 5/126:41 pm
BOI
- PHL
1 stop9h 29m
Delta
Deal found 3/9![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/285:50 am
PHL
- BOI
2 stops9h 30m
Southwest
Sat 5/22:50 pm
BOI
- PHL
1 stop6h 10m
Southwest
Deal found 3/12![Southwest logo]()
$322
This Delta deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/79:40 am
PHL
- BOI
2 stops14h 55m
Delta
Tue 4/148:40 pm
BOI
- PHL
2 stops13h 08m
Delta
Deal found 3/8![Delta logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:22 am
PHL
- GEG
1 stop9h 01m
Alaska Airlines
Wed 4/297:41 pm
GEG
- PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:17 am
PHL
- GEG
2 stops9h 23m
United Airlines
Tue 4/217:00 am
GEG
- PHL
2 stops13h 43m
United Airlines
Deal found 3/12![United Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:10 am
PHL
- GEG
1 stop8h 03m
Delta
Tue 5/265:37 pm
GEG
- PHL
2 stops9h 33m
Delta
Deal found 3/12![Delta logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:41 pm
PHL
- GEG
1 stop17h 08m
Multiple Airlines
Sun 4/269:19 pm
GEG
- PHL
2 stops35h 32m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$336
This Alaska Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:22 am
PHL
- BOI
1 stop8h 30m
Alaska Airlines
Tue 5/124:38 pm
BOI
- PHL
1 stop11h 02m
Alaska Airlines
Deal found 3/11![Alaska Airlines logo]()
$337
This American Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
PHL
- GEG
1 stop9h 23m
American Airlines
Sat 5/2312:51 pm
GEG
- PHL
1 stop8h 45m
American Airlines
Deal found 3/9![American Airlines logo]()
$338
Best flights from Philadelphia to IdahoDiscover carefully curated flight deals from Philadelphia to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 13, 2026.
Discover carefully curated flight deals from Philadelphia to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 13, 2026.
This United Airlines deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:40 pm
PHL
- BOI
1 stop7h 42m
United Airlines
Tue 4/142:37 pm
BOI
- PHL
1 stop7h 06m
United Airlines
Deal found 3/8![United Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/285:50 am
PHL
- BOI
1 stop7h 05m
Southwest
Sat 5/22:50 pm
BOI
- PHL
1 stop6h 10m
Southwest
Deal found 3/12![Southwest logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:22 am
PHL
- GEG
1 stop9h 01m
Alaska Airlines
Wed 4/297:41 pm
GEG
- PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$328
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:30 am
PHL
- JAC
2 stops12h 43m
Delta
Wed 5/61:09 pm
JAC
- PHL
2 stops9h 50m
Delta
Deal found 3/9![Delta logo]()
$389
This American Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/297:14 am
PHL
- SUN
1 stop7h 45m
American Airlines
Sat 4/41:27 pm
SUN
- PHL
1 stop8h 27m
American Airlines
Deal found 3/9![American Airlines logo]()
$429
This Alaska Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:25 am
PHL
- BOI
1 stop10h 04m
Alaska Airlines
Sat 4/186:04 pm
BOI
- PHL
1 stop10h 01m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1812:25 pm
PHL
- GEG
2 stops12h 10m
Southwest
Mon 4/202:50 pm
GEG
- PHL
1 stop6h 45m
Southwest
Deal found 3/11![Southwest logo]()
$343
This United Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/29:55 am
PHL
- IDA
1 stop7h 48m
United Airlines
Sat 5/92:31 pm
IDA
- PHL
1 stop7h 12m
United Airlines
Deal found 3/9![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:00 am
PHL
- BOI
2 stops12h 03m
Delta
Sat 4/182:18 pm
BOI
- PHL
1 stop8h 41m
Delta
Deal found 3/12![Delta logo]()
$393
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:00 am
PHL
- SUN
1 stop7h 35m
United Airlines
Sat 4/182:24 pm
SUN
- PHL
1 stop7h 19m
United Airlines
Deal found 3/12![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/14:30 pm
PHL
- BOI
2 stops10h 15m
Southwest
Wed 6/104:05 pm
BOI
- PHL
1 stop6h 55m
Southwest
Deal found 3/9![Southwest logo]()
$372
This American Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1912:04 pm
PHL
- IDA
2 stops11h 15m
American Airlines
Tue 8/251:00 pm
IDA
- PHL
1 stop9h 38m
American Airlines
Deal found 3/12![American Airlines logo]()
$440
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 5/197:10 am
PHL
- GEG
1 stop8h 03m
Delta
Sat 5/235:00 am
GEG
- PHL
2 stops12h 49m
Delta
Deal found 3/13![Delta logo]()
$400
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:40 am
PHL
- GEG
1 stop7h 10m
Southwest
Mon 4/202:50 pm
GEG
- PHL
1 stop6h 45m
Southwest
Deal found 3/12![Southwest logo]()
$379
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:36 am
PHL
- GEG
2 stops12h 35m
United Airlines
Wed 4/291:46 pm
GEG
- PHL
1 stop6h 58m
United Airlines
Deal found 3/10![United Airlines logo]()
$402
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:05 pm
PHL
- IDA
1 stop6h 35m
Delta
Sat 4/256:58 pm
IDA
- PHL
1 stop9h 01m
Delta
Deal found 3/9![Delta logo]()
$404
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/123:44 pm
PHL
- JAC
1 stop6h 31m
Delta
Tue 5/197:00 am
JAC
- PHL
2 stops10h 29m
Delta
Deal found 3/11![Delta logo]()
$404
This Southwest deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/315:20 am
PHL
- BOI
1 stop7h 05m
Southwest
Tue 6/94:05 pm
BOI
- PHL
1 stop6h 55m
Southwest
Deal found 3/9![Southwest logo]()
$407
This United Airlines deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:12 am
PHL
- BOI
1 stop11h 12m
United Airlines
Sat 4/186:15 am
BOI
- PHL
1 stop7h 32m
United Airlines
Deal found 3/8![United Airlines logo]()
$417
This Southwest deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:35 am
PHL
- GEG
2 stops11h 10m
Southwest
Sun 4/266:25 am
GEG
- PHL
2 stops9h 25m
Southwest
Deal found 3/9![Southwest logo]()
$413
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/257:10 am
PHL
- GEG
1 stop8h 03m
Delta
Thu 6/47:23 pm
GEG
- PHL
1 stop7h 12m
Delta
Deal found 3/11![Delta logo]()
$416
This Alaska Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:40 pm
PHL
- IDA
2 stops11h 59m
Alaska Airlines
Fri 9/114:00 pm
IDA
- PHL
2 stops24h 22m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$560
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:55 pm
PHL
- IDA
1 stop7h 08m
United Airlines
Wed 8/262:30 pm
IDA
- PHL
1 stop7h 07m
United Airlines
Deal found 3/12![United Airlines logo]()
$430
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 5/2912:36 pm
PHL
- JAC
2 stops10h 53m
Delta
Tue 6/27:45 am
JAC
- PHL
2 stops9h 44m
Delta
Deal found 3/13![Delta logo]()
$429
This United Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:00 am
PHL
- SUN
1 stop7h 35m
United Airlines
Wed 4/152:24 pm
SUN
- PHL
1 stop7h 19m
United Airlines
Deal found 3/9![United Airlines logo]()
$481
This Delta deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:45 am
PHL
- SUN
2 stops10h 49m
Delta
Fri 6/57:30 am
SUN
- PHL
2 stops9h 59m
Delta
Deal found 3/10![Delta logo]()
$460
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:28 am
PHL
- IDA
2 stops12h 35m
United Airlines
Fri 9/112:30 pm
IDA
- PHL
1 stop7h 07m
United Airlines
Deal found 3/10![United Airlines logo]()
$505
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:45 am
PHL
- IDA
2 stops8h 29m
Delta
Fri 9/116:50 pm
IDA
- PHL
1 stop8h 53m
Delta
Deal found 3/9![Delta logo]()
$504
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:00 am
PHL
- JAC
1 stop7h 21m
United Airlines
Wed 4/222:35 pm
JAC
- PHL
1 stop7h 08m
United Airlines
Deal found 3/10![United Airlines logo]()
$559
This Delta deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:00 am
PHL
- IDA
1 stop7h 27m
Delta
Sun 3/296:55 pm
IDA
- PHL
2 stops12h 27m
Delta
Deal found 3/10![Delta logo]()
$524
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated March 13, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated March 13, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/79:40 am
PHL
- BOI
2 stops14h 55m
Delta
Tue 4/148:40 pm
BOI
- PHL
2 stops13h 08m
Delta
Deal found 3/8![Delta logo]()
$327
This Delta deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:54 pm
PHL
- GEG
1 stop7h 40m
Delta
Tue 4/212:10 pm
GEG
- PHL
1 stop6h 48m
Delta
Deal found 3/10![Delta logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:25 am
PHL
- BOI
1 stop10h 04m
Alaska Airlines
Sat 4/186:04 pm
BOI
- PHL
1 stop10h 01m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:20 am
PHL
- BOI
2 stops11h 05m
Southwest
Mon 4/204:20 pm
BOI
- PHL
1 stop6h 15m
Southwest
Deal found 3/10![Southwest logo]()
$342
This Frontier deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:41 pm
PHL
- GEG
1 stop17h 08m
Frontier
Sun 4/2611:44 am
GEG
- PHL
1 stop14h 50m
Frontier
Deal found 3/9![Frontier logo]()
$200
This Southwest deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:35 am
PHL
- GEG
1 stop7h 30m
Southwest
Wed 4/221:45 pm
GEG
- PHL
1 stop7h 10m
Southwest
Deal found 3/10![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1812:25 pm
PHL
- GEG
2 stops11h 50m
Southwest
Tue 4/211:45 pm
GEG
- PHL
1 stop7h 10m
Southwest
Deal found 3/10![Southwest logo]()
$302
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:17 am
PHL
- GEG
2 stops9h 23m
United Airlines
Tue 4/217:00 am
GEG
- PHL
2 stops13h 43m
United Airlines
Deal found 3/12![United Airlines logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:41 pm
PHL
- GEG
1 stop17h 08m
Multiple Airlines
Sun 4/269:19 pm
GEG
- PHL
2 stops35h 32m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$336
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:35 am
PHL
- GEG
1 stop7h 30m
Southwest
Mon 4/202:50 pm
GEG
- PHL
1 stop6h 45m
Southwest
Deal found 3/11![Southwest logo]()
$338
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:12 am
PHL
- BOI
1 stop11h 12m
United Airlines
Sat 5/22:33 pm
BOI
- PHL
1 stop7h 10m
United Airlines
Deal found 3/12![United Airlines logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:22 am
PHL
- GEG
1 stop9h 01m
Alaska Airlines
Wed 4/297:41 pm
GEG
- PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$328
One-way flights from Philadelphia to IdahoSearch for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
This Mytrip deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:41 pm
PHL
- GEG
1 stop17h 08m
Frontier
Deal found 3/12![Frontier logo]()
$120
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:10 am
PHL
- GEG
1 stop8h 03m
Delta
Deal found 3/9![Delta logo]()
$149
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/812:26 pm
PHL
- GEG
2 stops14h 22m
Delta
Deal found 3/11![Delta logo]()
$154
This Delta deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:10 am
PHL
- BOI
1 stop9h 33m
Delta
Deal found 3/12![Delta logo]()
$159
This Mytrip deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Deal found 3/12![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/168:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Deal found 3/11![Frontier logo]()
$173
This American Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:30 pm
PHL
- GEG
1 stop8h 39m
American Airlines
Deal found 3/12![American Airlines logo]()
$180
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/203:58 pm
PHL
- GEG
1 stop10h 11m
American Airlines
Deal found 3/13![American Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:41 pm
PHL
- IDA
3 stops44h 46m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$184
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:10 am
PHL
- BOI
1 stop9h 33m
Delta
Deal found 3/11![Delta logo]()
$189
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/45:40 am
PHL
- GEG
1 stop7h 10m
Southwest
Deal found 3/12![Southwest logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:11 am
PHL
- BOI
2 stops52h 16m
Frontier
Deal found 3/11![Frontier logo]()
$203
Find flight deals from Philadelphia to Idaho
Keep the following information in mind while searching for Philadelphia to Idaho flight deals. Data was last updated March 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $200 (Frontier) |
One-way from | $120 (Mytrip) |
Popular in | December |
Cheapest in | September |
Average price | $408 |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia 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 March 13, 2026.
Use the filters below to find and compare flights from Philadelphia to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 4/7
3:40 pm-9:22 pm
1 stop7h 42m
Boise Air Term. Gowen Fld
Tue 4/14
2:37 pm-11:43 pm
1 stop7h 06m
$317
Quickest round-trip
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 4/28
5:50 am-10:55 am
1 stop7h 05m
Boise Air Term. Gowen Fld
Sat 5/2
2:50 pm-11:00 pm
1 stop6h 10m
$317
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 4/28
7:22 am-1:23 pm
1 stop9h 01m
Spokane
Wed 4/29
7:41 pm-6:02 am
1 stop7h 21m
$328
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 4/14
7:25 am-3:29 pm
1 stop10h 04m
Boise Air Term. Gowen Fld
Sat 4/18
6:04 pm-6:05 am
1 stop10h 01m
$337
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 4/18
12:25 pm-9:35 pm
2 stops12h 10m
Spokane
Mon 4/20
2:50 pm-12:35 am
1 stop6h 45m
$343
PhiladelphiaIdaho Falls
PHL - IDA
PHLIDA
Philadelphia
Sat 5/2
9:55 am-3:43 pm
1 stop7h 48m
Idaho Falls Fanning Field
Sat 5/9
2:31 pm-11:43 pm
1 stop7h 12m
$349
PhiladelphiaHailey
PHL - SUN
PHLSUN
Philadelphia
Wed 4/15
8:00 am-1:35 pm
1 stop7h 35m
Hailey Sun Valley-Friedman
Sat 4/18
2:24 pm-11:43 pm
1 stop7h 19m
$369
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Mon 6/1
4:30 pm-12:45 am
2 stops10h 15m
Boise Air Term. Gowen Fld
Wed 6/10
4:05 pm-1:00 am
1 stop6h 55m
$372
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 4/16
5:40 am-9:50 am
1 stop7h 10m
Spokane
Mon 4/20
2:50 pm-12:35 am
1 stop6h 45m
$379
PhiladelphiaJackson
PHL - JAC
PHLJAC
Philadelphia
Sat 5/2
5:30 am-4:13 pm
2 stops12h 43m
Jackson Hole
Wed 5/6
1:09 pm-12:59 am
2 stops9h 50m
$389
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Philadelphia to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Philadelphia with our price prediction graph.
PHL-GEG
PHL-BOI
PHL-IDA
PHL-JAC
PHL-SUN
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 Philadelphia to Idaho
PHL-USID
PHL-GEG
PHL-BOI
PHL-IDA
PHL-JAC
What is the cheapest month to book a flight from Philadelphia to Idaho?
Currently, May is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $136). Flying from Philadelphia to Idaho in February is currently the most expensive (average of $298). 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.
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 March 13, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from Philadelphia to Idaho to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Related info for your journey
Find useful and relevant information for your journey from Philadelphia 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 Philadelphia to Idaho
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Complete your trip
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Search flights from Philadelphia to Idaho by cabin class
Find flights from Philadelphia to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Idaho flights
Browse other Philadelphia and Idaho flight options. Last updated on March 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Philadelphia to Idaho flights
Consider these flights traveling from Philadelphia to Idaho.
Top 4 airlines flying from Philadelphia to Idaho
Discover the top 4 airlines that operate flights from Philadelphia 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 March 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$199 | Average$540 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$487 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$350 | Average$623 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$358 | Average$488 | FlexibilityNo cancel fee | On-time63% |