$136+ 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 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Jun 14 — Jun 211
Round-trip
1 adult, Economy
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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 May 15, 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 May 15, 2026.
This Booking.com deal was found by Cheapflights users on 5/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:35 pm
PHL
- GEG
1 stop18h 03m
Frontier
Wed 6/1012:31 pm
GEG
- PHL
1 stop20h 16m
Frontier
Deal found 5/11![Frontier logo]()
$236
This Frontier deal was found by Cheapflights users on 5/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Sun 6/71:33 pm
BOI
- PHL
1 stop14h 04m
Frontier
Deal found 5/10![Frontier logo]()
$246
This Booking.com deal was found by Cheapflights users on 5/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/28:35 pm
PHL
- GEG
1 stop18h 03m
Frontier
Mon 6/812:33 pm
GEG
- PHL
1 stop20h 14m
Frontier
Deal found 5/10![Frontier logo]()
$262
This Delta deal was found by Cheapflights users on 5/13. 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.
Thu 8/207:09 pm
PHL
- GEG
1 stop7h 00m
Delta
Mon 8/317:21 pm
GEG
- PHL
1 stop7h 44m
Delta
Deal found 5/13![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 5/11. 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.
Sat 8/227:20 am
PHL
- BOI
1 stop7h 29m
Delta
Sat 8/295:10 am
BOI
- PHL
1 stop9h 17m
Delta
Deal found 5/11![Delta logo]()
$279
This Booking.com deal was found by Cheapflights users on 5/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1012:42 pm
PHL
- BOI
1 stop25h 48m
Frontier
Sun 6/141:25 pm
BOI
- PHL
1 stop14h 13m
Frontier
Deal found 5/11![Frontier logo]()
$282
This Delta deal was found by Cheapflights users on 5/10. 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 6/22:23 pm
PHL
- GEG
1 stop9h 57m
Delta
Mon 6/87:59 pm
GEG
- PHL
2 stops11h 48m
Delta
Deal found 5/10![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 5/11. 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.
Fri 7/35:40 am
PHL
- BOI
2 stops8h 35m
Delta
Sat 7/1111:53 am
BOI
- PHL
2 stops9h 23m
Delta
Deal found 5/11![Delta logo]()
$290
This Gotogate deal was found by Cheapflights users on 5/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/208:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Tue 5/261:25 pm
BOI
- PHL
1 stop14h 12m
Frontier
Deal found 5/11![Frontier logo]()
$291
This American Airlines deal was found by Cheapflights users on 5/13. 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.
Tue 7/79:45 am
PHL
- BOI
1 stop9h 04m
American Airlines
Tue 7/213:10 pm
BOI
- PHL
1 stop7h 49m
American Airlines
Deal found 5/13![American Airlines logo]()
$297
This American Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 10/207:36 am
PHL
- JAC
1 stop6h 18m
American Airlines
Tue 10/2712:29 pm
JAC
- PHL
1 stop9h 13m
American Airlines
Deal found 5/14![American Airlines logo]()
$311
This Alaska Airlines deal was found by Cheapflights users on 5/12. 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 9/14:44 pm
PHL
- GEG
1 stop9h 30m
Alaska Airlines
Wed 9/25:09 am
GEG
- PHL
1 stop7h 35m
Alaska Airlines
Deal found 5/12![Alaska Airlines logo]()
$312
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 May 15, 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 May 15, 2026.
This Delta deal was found by Cheapflights users on 5/11. 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 8/207:09 pm
PHL
- GEG
1 stop7h 00m
Delta
Mon 8/315:40 pm
GEG
- PHL
1 stop9h 25m
Delta
Deal found 5/11![Delta logo]()
$279
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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.
Sat 9/124:44 pm
PHL
- GEG
1 stop9h 30m
Alaska Airlines
Fri 9/187:00 am
GEG
- PHL
1 stop19h 40m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 5/12. 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.
Wed 6/242:20 pm
PHL
- BOI
2 stops11h 00m
Southwest
Tue 6/304:05 pm
BOI
- PHL
1 stop6h 55m
Southwest
Deal found 5/12![Southwest logo]()
$374
This United Airlines deal was found by Cheapflights users on 5/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/91:31 pm
PHL
- SUN
1 stop7h 27m
United Airlines
Mon 7/131:57 pm
SUN
- PHL
2 stops13h 34m
United Airlines
Deal found 5/11![United Airlines logo]()
$436
This Delta deal was found by Cheapflights users on 5/12. 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 6/96:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Mon 6/157:08 pm
GEG
- PHL
1 stop8h 00m
Delta
Deal found 5/12![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 5/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2312:52 pm
PHL
- JAC
1 stop8h 50m
American Airlines
Wed 7/291:43 pm
JAC
- PHL
1 stop9h 16m
American Airlines
Deal found 5/10![American Airlines logo]()
$598
This Delta deal was found by Cheapflights users on 5/12. 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 7/215:15 am
PHL
- GEG
1 stop9h 25m
Delta
Tue 7/285:37 pm
GEG
- PHL
1 stop8h 52m
Delta
Deal found 5/12![Delta logo]()
$279
This Alaska Airlines deal was found by Cheapflights users on 5/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/14:44 pm
PHL
- GEG
1 stop9h 30m
Alaska Airlines
Wed 9/25:09 am
GEG
- PHL
1 stop7h 35m
Alaska Airlines
Deal found 5/10![Alaska Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 5/13. 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.
Thu 6/46:45 pm
PHL
- GEG
1 stop8h 13m
Delta
Wed 6/1012:35 pm
GEG
- PHL
1 stop8h 23m
Delta
Deal found 5/13![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 5/10. 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 7/84:08 pm
PHL
- GEG
2 stops10h 47m
Delta
Mon 7/137:08 pm
GEG
- PHL
1 stop8h 07m
Delta
Deal found 5/10![Delta logo]()
$284
This Alaska Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:00 am
PHL
- IDA
1 stop10h 35m
Alaska Airlines
Sat 10/316:09 am
IDA
- PHL
1 stop9h 30m
Alaska Airlines
Deal found 5/14![Alaska Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 10/2811:39 am
PHL
- IDA
2 stops11h 29m
United Airlines
Sat 10/315:00 am
IDA
- PHL
2 stops10h 22m
United Airlines
Deal found 5/14![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 5/12. 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.
Wed 8/55:15 am
PHL
- GEG
1 stop9h 13m
Delta
Wed 8/125:39 pm
GEG
- PHL
1 stop9h 01m
Delta
Deal found 5/12![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 6/45:00 am
PHL
- BOI
1 stop6h 45m
Southwest
Sun 6/79:45 pm
BOI
- PHL
2 stops10h 50m
Southwest
Deal found 5/14![Southwest logo]()
$469
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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.
Sat 8/224:44 pm
PHL
- IDA
1 stop22h 22m
Alaska Airlines
Fri 8/284:14 pm
IDA
- PHL
1 stop21h 30m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 7/66:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Mon 7/204:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Deal found 5/15![Delta logo]()
$317
This United Airlines deal was found by Cheapflights users on 5/10. 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.
Fri 8/281:35 pm
PHL
- JAC
1 stop7h 16m
United Airlines
Tue 9/11:45 pm
JAC
- PHL
1 stop8h 00m
United Airlines
Deal found 5/10![United Airlines logo]()
$473
This Delta deal was found by Cheapflights users on 5/12. 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.
Mon 6/225:15 am
PHL
- BOI
1 stop9h 39m
Delta
Mon 6/2911:45 pm
BOI
- PHL
1 stop9h 17m
Delta
Deal found 5/12![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 7/38:00 am
PHL
- BOI
2 stops8h 45m
Southwest
Mon 7/67:10 am
BOI
- PHL
2 stops8h 40m
Southwest
Deal found 5/14![Southwest logo]()
$519
This United Airlines deal was found by Cheapflights users on 5/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1311:38 am
PHL
- JAC
1 stop9h 04m
United Airlines
Wed 7/158:00 am
JAC
- PHL
2 stops14h 57m
United Airlines
Deal found 5/13![United Airlines logo]()
$484
This Delta deal was found by Cheapflights users on 5/11. 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 6/27:10 am
PHL
- BOI
1 stop9h 31m
Delta
Fri 6/52:23 pm
BOI
- PHL
1 stop6h 49m
Delta
Deal found 5/11![Delta logo]()
$327
This United Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 6/28:05 am
PHL
- JAC
2 stops11h 49m
United Airlines
Tue 6/98:00 am
JAC
- PHL
2 stops14h 59m
United Airlines
Deal found 5/14![United Airlines logo]()
$494
This United Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 8/2910:05 am
PHL
- WYS
1 stop8h 02m
United Airlines
Wed 9/21:55 pm
WYS
- PHL
1 stop7h 50m
United Airlines
Deal found 5/14![United Airlines logo]()
$509
This Alaska Airlines deal was found by Cheapflights users on 5/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:39 pm
PHL
- SUN
1 stop18h 32m
Alaska Airlines
Mon 10/1911:53 am
SUN
- PHL
1 stop15h 47m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$578
This Delta deal was found by Cheapflights users on 5/10. 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 7/296:57 pm
PHL
- BOI
1 stop6h 49m
Delta
Sun 8/26:07 pm
BOI
- PHL
1 stop9h 22m
Delta
Deal found 5/10![Delta logo]()
$369
This United Airlines deal was found by Cheapflights users on 5/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:25 am
PHL
- IDA
1 stop7h 27m
United Airlines
Fri 8/282:25 pm
IDA
- PHL
1 stop7h 20m
United Airlines
Deal found 5/11![United Airlines logo]()
$514
This Delta deal was found by Cheapflights users on 5/10. 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 6/16:45 pm
PHL
- BOI
1 stop7h 19m
Delta
Sun 6/77:53 pm
BOI
- PHL
2 stops12h 54m
Delta
Deal found 5/10![Delta logo]()
$372
This United Airlines deal was found by Cheapflights users on 5/12. 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 10/310:10 am
PHL
- JAC
2 stops9h 42m
United Airlines
Wed 10/71:45 pm
JAC
- PHL
2 stops8h 52m
United Airlines
Deal found 5/12![United Airlines logo]()
$558
This United Airlines deal was found by Cheapflights users on 5/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:00 am
PHL
- WYS
1 stop7h 32m
United Airlines
Thu 6/112:19 pm
WYS
- PHL
1 stop7h 11m
United Airlines
Deal found 5/11![United Airlines logo]()
$585
This Delta deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 8/269:40 am
PHL
- JAC
2 stops12h 31m
Delta
Wed 9/21:10 pm
JAC
- PHL
2 stops9h 51m
Delta
Deal found 5/14![Delta logo]()
$450
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated May 15, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated May 15, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 5/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/208:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Tue 5/261:25 pm
BOI
- PHL
1 stop14h 12m
Frontier
Deal found 5/11![Frontier logo]()
$291
This Booking.com deal was found by Cheapflights users on 5/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Sun 6/71:33 pm
BOI
- PHL
1 stop14h 04m
Frontier
Deal found 5/12![Frontier logo]()
$272
This Booking.com deal was found by Cheapflights users on 5/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/28:35 pm
PHL
- GEG
1 stop18h 03m
Frontier
Mon 6/812:33 pm
GEG
- PHL
1 stop20h 14m
Frontier
Deal found 5/10![Frontier logo]()
$262
This American Airlines deal was found by Cheapflights users on 5/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:00 am
PHL
- BOI
1 stop7h 29m
American Airlines
Thu 6/43:12 pm
BOI
- PHL
1 stop7h 27m
American Airlines
Deal found 5/11![American Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 5/10. 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 6/22:23 pm
PHL
- GEG
1 stop9h 57m
Delta
Mon 6/87:59 pm
GEG
- PHL
2 stops11h 48m
Delta
Deal found 5/10![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 5/11. 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 6/27:10 am
PHL
- BOI
1 stop9h 31m
Delta
Thu 6/410:50 am
BOI
- PHL
2 stops12h 07m
Delta
Deal found 5/11![Delta logo]()
$284
This Booking.com deal was found by Cheapflights users on 5/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:35 pm
PHL
- GEG
1 stop18h 03m
Frontier
Wed 6/1012:31 pm
GEG
- PHL
1 stop20h 16m
Frontier
Deal found 5/11![Frontier logo]()
$236
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 6/57:01 pm
PHL
- GEG
1 stop7h 05m
Delta
Tue 6/95:30 am
GEG
- PHL
1 stop9h 05m
Delta
Deal found 5/15![Delta logo]()
$312
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 6/65:17 am
PHL
- GEG
1 stop9h 04m
Delta
Thu 6/1110:48 pm
GEG
- PHL
1 stop7h 46m
Delta
Deal found 5/15![Delta logo]()
$279
This Booking.com deal was found by Cheapflights users on 5/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1012:42 pm
PHL
- BOI
1 stop25h 48m
Frontier
Sun 6/141:25 pm
BOI
- PHL
1 stop14h 13m
Frontier
Deal found 5/11![Frontier logo]()
$282
This Delta deal was found by Cheapflights users on 5/13. 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 6/126:51 pm
PHL
- BOI
1 stop7h 18m
Delta
Sat 6/132:04 pm
BOI
- PHL
1 stop8h 56m
Delta
Deal found 5/13![Delta logo]()
$314
This Delta deal was found by Cheapflights users on 5/11. 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.
Fri 6/196:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Wed 6/245:20 am
GEG
- PHL
2 stops11h 00m
Delta
Deal found 5/11![Delta logo]()
$317
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 May 15, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated May 15, 2026.
This Booking.com deal was found by Cheapflights users on 5/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/148:37 pm
PHL
- GEG
1 stop17h 59m
Frontier
Deal found 5/11![Frontier logo]()
$136
This Booking.com deal was found by Cheapflights users on 5/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/298:37 pm
PHL
- BOI
1 stop17h 53m
Frontier
Deal found 5/12![Frontier logo]()
$136
This Delta deal was found by Cheapflights users on 5/13. 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 7/36:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 5/13![Delta logo]()
$140
This Delta deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 7/35:40 am
PHL
- BOI
1 stop7h 18m
Delta
Deal found 5/14![Delta logo]()
$140
This Delta deal was found by Cheapflights users on 5/11. 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 7/82:32 pm
PHL
- GEG
2 stops12h 23m
Delta
Deal found 5/11![Delta logo]()
$145
This United Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 9/1211:30 am
PHL
- BOI
2 stops11h 55m
United Airlines
Deal found 5/14![United Airlines logo]()
$145
This American Airlines deal was found by Cheapflights users on 5/13. 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.
Sat 6/135:00 am
PHL
- GEG
1 stop10h 01m
American Airlines
Deal found 5/13![American Airlines logo]()
$148
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Mon 9/76:25 am
PHL
- JAC
1 stop6h 48m
United Airlines
Deal found 5/12![United Airlines logo]()
$156
This Delta deal was found by Cheapflights users on 5/12. 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 7/75:15 am
PHL
- JAC
2 stops13h 45m
Delta
Deal found 5/12![Delta logo]()
$161
This Delta deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 7/106:55 pm
PHL
- GEG
1 stop8h 00m
Delta
Deal found 5/14![Delta logo]()
$173
This American Airlines deal was found by Cheapflights users on 5/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/147:36 am
PHL
- GEG
1 stop8h 35m
American Airlines
Deal found 5/11![American Airlines logo]()
$175
This United Airlines deal was found by Cheapflights users on 5/12. 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 6/21:31 pm
PHL
- JAC
1 stop7h 11m
United Airlines
Deal found 5/12![United Airlines logo]()
$175
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 May 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $236 (Booking.com) |
One-way from | $136 (Booking.com) |
Popular in | June |
Cheapest in | September |
Average price | $436 |
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 May 15, 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
7:09 pm-11:09 pm
1 stop7h 00m
Spokane
Mon 8/31
5:40 pm-6:05 am
1 stop9h 25m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 6/9
6:45 pm-11:55 pm
1 stop8h 10m
Spokane
Mon 6/15
7:08 pm-6:08 am
1 stop8h 00m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 7/21
5:15 am-11:40 am
1 stop9h 25m
Spokane
Tue 7/28
5:37 pm-5:29 am
1 stop8h 52m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 6/4
6:45 pm-11:58 pm
1 stop8h 13m
Spokane
Wed 6/10
12:35 pm-11:58 pm
1 stop8h 23m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 7/8
4:08 pm-11:55 pm
2 stops10h 47m
Spokane
Mon 7/13
7:08 pm-6:15 am
1 stop8h 07m
$284
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 9/12
4:44 pm-11:14 pm
1 stop9h 30m
Spokane
Fri 9/18
7:00 am-5:40 am
1 stop19h 40m
$312
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 9/1
4:44 pm-11:14 pm
1 stop9h 30m
Spokane
Wed 9/2
5:09 am-3:44 pm
1 stop7h 35m
$312
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 8/5
5:15 am-11:28 am
1 stop9h 13m
Spokane
Wed 8/12
5:39 pm-5:40 am
1 stop9h 01m
$317
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Mon 7/6
6:45 pm-11:55 pm
1 stop8h 10m
Spokane
Mon 7/20
4:30 pm-5:29 am
1 stop9h 59m
$317
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Mon 6/22
5:15 am-12:54 pm
1 stop9h 39m
Boise Air Term. Gowen Fld
Mon 6/29
11:45 pm-11:02 am
1 stop9h 17m
$319
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-JAC
PHL-IDA
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-JAC
PHL-IDA
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 38 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Philadelphia to Idaho?
Currently, August is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $131). Flying from Philadelphia to Idaho in December is currently the most expensive (average of $446). 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?
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 May 15, 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.
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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
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 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 May 15, 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 May 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$493 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$497 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$336 | Average$584 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$371 | Average$486 | FlexibilityNo cancel fee | On-time63% |