$126+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Aug 24 — Aug 311
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 July 25, 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 July 25, 2026.
This Frontier deal was found by Cheapflights users on 7/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:37 pm
PHL
- BOI
1 stop17h 52m
Frontier
Sun 8/2312:24 pm
BOI
- PHL
1 stop15h 15m
Frontier
Deal found 7/22![Frontier logo]()
$241
This Frontier deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:44 pm
PHL
- BOI
1 stop17h 20m
Frontier
Tue 9/2212:59 pm
BOI
- PHL
1 stop14h 37m
Frontier
Deal found 7/24![Frontier logo]()
$250
This American Airlines deal was found by Cheapflights users on 7/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:12 pm
PHL
- GEG
1 stop8h 13m
American Airlines
Wed 10/712:49 pm
GEG
- PHL
1 stop8h 36m
American Airlines
Deal found 7/22![American Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 7/23. 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 9/233:05 pm
PHL
- GEG
2 stops10h 55m
Southwest
Sat 9/2612:45 pm
GEG
- PHL
1 stop7h 10m
Southwest
Deal found 7/23![Southwest logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Wed 9/24:45 pm
PHL
- BOI
2 stops20h 44m
Frontier
Tue 9/81:24 pm
BOI
- PHL
1 stop14h 15m
Frontier
Deal found 7/22![Frontier logo]()
$296
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Sat 8/221:30 pm
PHL
- GEG
2 stops10h 16m
United Airlines
Sat 8/295:00 am
GEG
- PHL
2 stops9h 54m
United Airlines
Deal found 7/24![United Airlines logo]()
$300
This American Airlines deal was found by Cheapflights users on 7/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:35 am
PHL
- BOI
1 stop9h 14m
American Airlines
Tue 8/253:19 pm
BOI
- PHL
1 stop6h 40m
American Airlines
Deal found 7/22![American Airlines logo]()
$301
This Delta deal was found by Cheapflights users on 7/23. 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 8/207:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/315:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 7/23![Delta logo]()
$305
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:30 am
PHL
- BOI
2 stops10h 00m
Southwest
Thu 9/1712:10 pm
BOI
- PHL
1 stop7h 30m
Southwest
Deal found 7/22![Southwest logo]()
$306
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/204:05 pm
PHL
- GEG
2 stops10h 10m
Southwest
Thu 8/276:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Deal found 7/22![Southwest logo]()
$307
This United Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:10 am
PHL
- JAC
1 stop7h 12m
United Airlines
Fri 12/1112:30 pm
JAC
- PHL
1 stop8h 43m
United Airlines
Deal found 7/21![United Airlines logo]()
$311
This Priceline deal was found by Cheapflights users on 7/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:00 am
PHL
- BOI
1 stop10h 30m
Alaska Airlines
Mon 9/145:52 pm
BOI
- PHL
1 stop9h 48m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$315
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 July 25, 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 July 25, 2026.
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/204:05 pm
PHL
- GEG
2 stops10h 10m
Southwest
Thu 8/276:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Deal found 7/22![Southwest logo]()
$307
This Delta deal was found by Cheapflights users on 7/25. 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 9/33:58 pm
PHL
- BOI
1 stop7h 59m
Delta
Sat 9/195:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Deal found 7/25![Delta logo]()
$311
This Alaska Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:59 pm
PHL
- BOI
1 stop16h 57m
Alaska Airlines
Sun 9/202:16 pm
BOI
- PHL
1 stop13h 24m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:00 am
PHL
- WYS
1 stop7h 20m
United Airlines
Tue 8/251:55 pm
WYS
- PHL
2 stops9h 04m
United Airlines
Deal found 7/20![United Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 7/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/241:48 pm
PHL
- SUN
1 stop8h 36m
American Airlines
Mon 12/281:06 pm
SUN
- PHL
1 stop7h 46m
American Airlines
Deal found 7/24![American Airlines logo]()
$469
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Thu 8/611:06 am
PHL
- TWF
1 stop26h 54m
Multiple Airlines
Mon 8/101:45 pm
TWF
- PHL
2 stops20h 04m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$548
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/315:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 7/22![Delta logo]()
$316
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:30 am
PHL
- BOI
2 stops10h 00m
Southwest
Wed 9/302:25 pm
BOI
- PHL
1 stop7h 25m
Southwest
Deal found 7/22![Southwest logo]()
$324
This Delta deal was found by Cheapflights users on 7/23. 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 9/177:05 am
PHL
- GEG
1 stop11h 09m
Delta
Sun 9/2010:45 pm
GEG
- PHL
1 stop7h 42m
Delta
Deal found 7/23![Delta logo]()
$329
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/192:45 pm
PHL
- GEG
2 stops10h 40m
Southwest
Tue 8/257:30 am
GEG
- PHL
2 stops10h 05m
Southwest
Deal found 7/20![Southwest logo]()
$344
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:05 am
PHL
- GEG
1 stop11h 09m
Delta
Sun 9/275:14 pm
GEG
- PHL
1 stop9h 51m
Delta
Deal found 7/20![Delta logo]()
$335
This United Airlines deal was found by Cheapflights users on 7/23. 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 9/510:30 am
PHL
- BOI
2 stops14h 10m
United Airlines
Sat 9/1212:30 pm
BOI
- PHL
1 stop6h 57m
United Airlines
Deal found 7/23![United Airlines logo]()
$416
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/95:10 pm
PHL
- BOI
2 stops9h 50m
Southwest
Sat 10/172:25 pm
BOI
- PHL
1 stop6h 45m
Southwest
Deal found 7/22![Southwest logo]()
$358
This Delta deal was found by Cheapflights users on 7/22. 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.
Fri 9/46:55 pm
PHL
- GEG
1 stop7h 14m
Delta
Tue 9/85:49 pm
GEG
- PHL
1 stop9h 01m
Delta
Deal found 7/22![Delta logo]()
$338
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:05 pm
PHL
- BOI
2 stops9h 30m
Southwest
Tue 10/2711:20 am
BOI
- PHL
2 stops10h 10m
Southwest
Deal found 7/22![Southwest logo]()
$363
This United Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:25 am
PHL
- WYS
2 stops8h 55m
United Airlines
Wed 8/261:55 pm
WYS
- PHL
2 stops9h 04m
United Airlines
Deal found 7/20![United Airlines logo]()
$449
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 9/157:00 am
PHL
- JAC
1 stop30h 22m
Alaska Airlines
Tue 9/2212:02 pm
JAC
- PHL
2 stops25h 43m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$518
This Delta deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/236:15 am
PHL
- BOI
1 stop8h 23m
Delta
Thu 12/313:22 pm
BOI
- PHL
1 stop6h 18m
Delta
Deal found 7/21![Delta logo]()
$362
This Southwest deal was found by Cheapflights users on 7/24. 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.
Mon 10/55:10 pm
PHL
- BOI
2 stops9h 50m
Southwest
Sat 10/102:25 pm
BOI
- PHL
1 stop6h 45m
Southwest
Deal found 7/24![Southwest logo]()
$363
This Delta deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:20 am
PHL
- IDA
1 stop6h 55m
Delta
Fri 9/256:57 pm
IDA
- PHL
2 stops13h 17m
Delta
Deal found 7/21![Delta logo]()
$364
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 9/54:48 pm
PHL
- JAC
2 stops20h 27m
Alaska Airlines
Sat 9/122:10 pm
JAC
- PHL
1 stop23h 35m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$547
This United Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:05 am
PHL
- JAC
1 stop7h 23m
United Airlines
Wed 9/98:00 am
JAC
- PHL
2 stops13h 44m
United Airlines
Deal found 7/20![United Airlines logo]()
$498
This Southwest deal was found by Cheapflights users on 7/24. 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 9/83:05 pm
PHL
- GEG
2 stops10h 05m
Southwest
Tue 9/156:15 am
GEG
- PHL
2 stops11h 25m
Southwest
Deal found 7/24![Southwest logo]()
$378
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:00 am
PHL
- IDA
1 stop7h 27m
Delta
Sat 12/121:10 pm
IDA
- PHL
2 stops9h 41m
Delta
Deal found 7/23![Delta logo]()
$364
This Southwest deal was found by Cheapflights users on 7/25. 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.
Tue 9/85:10 pm
PHL
- BOI
1 stop8h 05m
Southwest
Tue 9/226:00 am
BOI
- PHL
2 stops10h 00m
Southwest
Deal found 7/25![Southwest logo]()
$387
This United Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:20 am
PHL
- IDA
2 stops10h 56m
United Airlines
Tue 8/252:25 pm
IDA
- PHL
1 stop7h 19m
United Airlines
Deal found 7/21![United Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:45 am
PHL
- IDA
2 stops10h 50m
Delta
Mon 8/316:00 am
IDA
- PHL
2 stops10h 49m
Delta
Deal found 7/21![Delta logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 9/84:48 pm
PHL
- JAC
1 stop22h 42m
Alaska Airlines
Wed 9/162:10 pm
JAC
- PHL
2 stops13h 30m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$628
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Mon 8/171:30 pm
PHL
- JAC
1 stop7h 11m
United Airlines
Fri 8/211:45 pm
JAC
- PHL
2 stops9h 14m
United Airlines
Deal found 7/24![United Airlines logo]()
$520
This Southwest deal was found by Cheapflights users on 7/23. 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 9/174:05 pm
PHL
- GEG
2 stops10h 15m
Southwest
Sun 9/202:30 pm
GEG
- PHL
1 stop6h 45m
Southwest
Deal found 7/23![Southwest logo]()
$397
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated July 25, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated July 25, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/151:40 pm
PHL
- BOI
1 stop11h 00m
American Airlines
Wed 8/193:19 pm
BOI
- PHL
1 stop6h 40m
American Airlines
Deal found 7/23![American Airlines logo]()
$335
This Frontier deal was found by Cheapflights users on 7/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:37 pm
PHL
- BOI
1 stop17h 52m
Frontier
Sun 8/2312:24 pm
BOI
- PHL
1 stop15h 15m
Frontier
Deal found 7/22![Frontier logo]()
$241
This American Airlines deal was found by Cheapflights users on 7/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:35 am
PHL
- BOI
1 stop9h 14m
American Airlines
Tue 8/253:19 pm
BOI
- PHL
1 stop6h 40m
American Airlines
Deal found 7/22![American Airlines logo]()
$301
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/193:05 pm
PHL
- GEG
2 stops10h 20m
Southwest
Wed 8/267:00 am
GEG
- PHL
2 stops10h 55m
Southwest
Deal found 7/22![Southwest logo]()
$321
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/204:05 pm
PHL
- GEG
1 stop8h 55m
Southwest
Thu 8/276:00 am
GEG
- PHL
1 stop7h 00m
Southwest
Deal found 7/22![Southwest logo]()
$289
This Delta deal was found by Cheapflights users on 7/23. 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 8/207:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/315:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 7/23![Delta logo]()
$305
This American Airlines deal was found by Cheapflights users on 7/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:30 am
PHL
- BOI
1 stop8h 59m
American Airlines
Wed 8/263:19 pm
BOI
- PHL
1 stop6h 40m
American Airlines
Deal found 7/22![American Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Sat 8/221:30 pm
PHL
- GEG
2 stops10h 16m
United Airlines
Sat 8/295:00 am
GEG
- PHL
2 stops9h 54m
United Airlines
Deal found 7/24![United Airlines logo]()
$300
This American Airlines deal was found by Cheapflights users on 7/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:57 pm
PHL
- GEG
1 stop10h 45m
American Airlines
Sat 8/295:40 am
GEG
- PHL
1 stop10h 08m
American Airlines
Deal found 7/25![American Airlines logo]()
$327
This American Airlines deal was found by Cheapflights users on 7/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:00 am
PHL
- JAC
1 stop7h 12m
American Airlines
Wed 9/21:47 pm
JAC
- PHL
1 stop6h 36m
American Airlines
Deal found 7/25![American Airlines logo]()
$321
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:00 am
PHL
- BOI
2 stops9h 40m
Southwest
Mon 8/3111:30 am
BOI
- PHL
1 stop7h 35m
Southwest
Deal found 7/22![Southwest logo]()
$306
This United Airlines deal was found by Cheapflights users on 7/24. 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 8/271:30 pm
PHL
- BOI
2 stops10h 07m
United Airlines
Mon 8/312:44 pm
BOI
- PHL
1 stop7h 00m
United Airlines
Deal found 7/24![United Airlines logo]()
$334
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 July 25, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated July 25, 2026.
This Gotogate deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:37 pm
PHL
- BOI
1 stop16h 52m
Frontier
Deal found 7/21![Frontier logo]()
$126
This American Airlines deal was found by Cheapflights users on 7/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:00 am
PHL
- GEG
1 stop9h 54m
American Airlines
Deal found 7/24![American Airlines logo]()
$145
This Southwest deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:05 pm
PHL
- GEG
2 stops10h 50m
Southwest
Deal found 7/21![Southwest logo]()
$150
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:00 am
PHL
- BOI
1 stop11h 31m
United Airlines
Deal found 7/22![United Airlines logo]()
$151
This United Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:30 am
PHL
- BOI
2 stops11h 28m
United Airlines
Deal found 7/21![United Airlines logo]()
$156
This American Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:00 am
PHL
- JAC
1 stop7h 12m
American Airlines
Deal found 7/20![American Airlines logo]()
$156
This Trip.com deal was found by Cheapflights users on 7/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:41 pm
PHL
- GEG
1 stop8h 14m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$160
This Orbitz deal was found by Cheapflights users on 7/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:41 pm
PHL
- BOI
1 stop17h 15m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$161
This American Airlines deal was found by Cheapflights users on 7/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:00 am
PHL
- JAC
1 stop7h 12m
American Airlines
Deal found 7/23![American Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Wed 8/124:30 pm
PHL
- BOI
2 stops21h 59m
Frontier
Deal found 7/22![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Tue 8/119:16 pm
PHL
- GEG
2 stops50h 08m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$165
This United Airlines deal was found by Cheapflights users on 7/23. 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 9/710:30 am
PHL
- JAC
2 stops10h 11m
United Airlines
Deal found 7/23![United Airlines logo]()
$166
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 July 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $241 (Frontier) |
One-way from | $126 (Gotogate) |
Popular in | June |
Cheapest in | September |
Average price | $524 |
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 July 25, 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
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 8/20
4:05 pm-11:15 pm
2 stops10h 10m
Spokane
Thu 8/27
6:00 am-5:55 pm
1 stop8h 55m
$307
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Thu 9/3
3:58 pm-9:57 pm
1 stop7h 59m
Boise Air Term. Gowen Fld
Sat 9/19
5:59 pm-5:50 am
1 stop9h 51m
$311
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 8/20
7:00 pm-11:53 pm
1 stop7h 53m
Spokane
Mon 8/31
5:40 pm-5:50 am
1 stop9h 10m
$316
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Sat 9/26
6:30 am-2:30 pm
2 stops10h 00m
Boise Air Term. Gowen Fld
Wed 9/30
2:25 pm-11:50 pm
1 stop7h 25m
$324
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 9/17
7:05 am-3:14 pm
1 stop11h 09m
Spokane
Sun 9/20
10:45 pm-9:27 am
1 stop7h 42m
$329
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Mon 9/14
6:59 pm-9:56 am
1 stop16h 57m
Boise Air Term. Gowen Fld
Sun 9/20
2:16 pm-5:40 am
1 stop13h 24m
$330
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 9/23
7:05 am-3:14 pm
1 stop11h 09m
Spokane
Sun 9/27
5:14 pm-6:05 am
1 stop9h 51m
$335
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Fri 9/4
6:55 pm-11:09 pm
1 stop7h 14m
Spokane
Tue 9/8
5:49 pm-5:50 am
1 stop9h 01m
$338
PhiladelphiaWest Yellowstone
PHL - WYS
PHLWYS
Philadelphia
Tue 8/18
8:00 am-1:20 pm
1 stop7h 20m
West Yellowstone
Tue 8/25
1:55 pm-12:59 am
2 stops9h 04m
$339
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 8/19
2:45 pm-10:25 pm
2 stops10h 40m
Spokane
Tue 8/25
7:30 am-8:35 pm
2 stops10h 05m
$344
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-BOI
PHL-GEG
PHL-JAC
PHL-IDA
PHL-WYS
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-BOI
PHL-GEG
PHL-JAC
PHL-IDA
What is the cheapest month to book a flight from Philadelphia to Idaho?
Currently, April is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $423). Flying from Philadelphia to Idaho in June is currently the most expensive (average of $615). 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.
How much does it cost to fly round-trip from Philadelphia to Idaho?
Airfare is below average for this route at the moment.
Philadelphia to Idaho flights typically cost between $314 and $591 in August.The cheapest round-trip price found within the last 5 days was $241 on Frontier (Aug 17-Aug 23).
How far ahead should I book a flight from Philadelphia to Idaho?
The price you pay for your flight from Philadelphia to Idaho may vary depending on when you book. For the best chance of a lower fare, look to book 8 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 July 25, 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.
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
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
Complete your trip to Idaho by adding a car rental and/or hotel reservation to your travel itinerary.
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 July 25, 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 July 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$229 | Average$526 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$517 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$318 | Average$592 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$371 | Average$556 | FlexibilityNo cancel fee | On-time63% |