$94+ 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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
May 23 — May 301
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 April 23, 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 April 23, 2026.
This Mytrip deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 5/258:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Tue 6/21:25 pm
BOI
- PHL
1 stop14h 12m
Frontier
Deal found 4/19![Frontier logo]()
$196
This Delta deal was found by Cheapflights users on 4/21. 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 6/37:25 am
PHL
- GEG
1 stop7h 36m
Delta
Wed 6/105:37 pm
GEG
- PHL
1 stop9h 08m
Delta
Deal found 4/21![Delta logo]()
$197
This Delta deal was found by Cheapflights users on 4/20. 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.
Tue 8/117:05 am
PHL
- BOI
1 stop10h 33m
Delta
Tue 8/181:43 pm
BOI
- PHL
1 stop9h 18m
Delta
Deal found 4/20![Delta logo]()
$197
This Delta deal was found by Cheapflights users on 4/20. 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 8/127:05 am
PHL
- BOI
1 stop9h 17m
Delta
Thu 8/207:30 pm
BOI
- PHL
1 stop8h 35m
Delta
Deal found 4/20![Delta logo]()
$209
This Delta deal was found by Cheapflights users on 4/20. 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.
Tue 8/116:00 am
PHL
- BOI
2 stops10h 03m
Delta
Mon 8/1711:30 pm
BOI
- PHL
1 stop9h 31m
Delta
Deal found 4/20![Delta logo]()
$214
This Delta deal was found by Cheapflights users on 4/20. 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.
Thu 8/137:05 am
PHL
- BOI
1 stop10h 33m
Delta
Thu 8/2011:30 pm
BOI
- PHL
1 stop8h 08m
Delta
Deal found 4/20![Delta logo]()
$221
This Delta deal was found by Cheapflights users on 4/20. 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.
Fri 8/147:05 am
PHL
- GEG
1 stop8h 57m
Delta
Wed 8/195:40 pm
GEG
- PHL
1 stop9h 25m
Delta
Deal found 4/20![Delta logo]()
$226
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Thu 5/217:34 am
PHL
- GEG
1 stop8h 40m
American Airlines
Wed 5/272:08 pm
GEG
- PHL
1 stop7h 23m
American Airlines
Deal found 4/20![American Airlines logo]()
$233
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Mon 5/255:00 am
PHL
- JAC
1 stop7h 27m
American Airlines
Thu 5/2811:07 am
JAC
- PHL
1 stop8h 53m
American Airlines
Deal found 4/20![American Airlines logo]()
$233
This Delta deal was found by Cheapflights users on 4/21. 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 6/37:25 am
PHL
- GEG
1 stop7h 36m
Delta
Thu 6/114:30 pm
GEG
- PHL
1 stop10h 15m
Delta
Deal found 4/21![Delta logo]()
$238
This Booking.com deal was found by Cheapflights users on 4/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Tue 5/261:25 pm
BOI
- PHL
1 stop14h 12m
Frontier
Deal found 4/21![Frontier logo]()
$238
This Delta deal was found by Cheapflights users on 4/21. 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.
Tue 6/96:05 am
PHL
- BOI
2 stops11h 07m
Delta
Mon 6/2211:45 pm
BOI
- PHL
1 stop7h 49m
Delta
Deal found 4/21![Delta logo]()
$243
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 April 23, 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 April 23, 2026.
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:18 pm
PHL
- GEG
2 stops9h 17m
Delta
Wed 6/104:30 pm
GEG
- PHL
1 stop10h 15m
Delta
Deal found 4/23![Delta logo]()
$202
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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.
Sat 8/297:00 am
PHL
- BOI
1 stop10h 31m
Alaska Airlines
Wed 9/26:00 am
BOI
- PHL
1 stop7h 44m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$341
This United Airlines deal was found by Cheapflights users on 4/21. 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 7/81:31 pm
PHL
- SUN
1 stop7h 27m
United Airlines
Wed 7/151:57 pm
SUN
- PHL
2 stops13h 34m
United Airlines
Deal found 4/21![United Airlines logo]()
$406
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Wed 8/195:00 am
PHL
- IDA
1 stop8h 30m
American Airlines
Tue 8/2512:46 pm
IDA
- PHL
1 stop7h 36m
American Airlines
Deal found 4/20![American Airlines logo]()
$420
This Delta deal was found by Cheapflights users on 4/21. 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 6/312:38 pm
PHL
- GEG
2 stops13h 57m
Delta
Thu 6/115:05 pm
GEG
- PHL
2 stops12h 39m
Delta
Deal found 4/21![Delta logo]()
$249
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/44:06 pm
PHL
- BOI
1 stop8h 22m
Delta
Thu 6/116:08 pm
BOI
- PHL
1 stop9h 37m
Delta
Deal found 4/23![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:05 am
PHL
- BOI
1 stop10h 33m
Delta
Sat 8/293:25 pm
BOI
- PHL
1 stop6h 15m
Delta
Deal found 4/23![Delta logo]()
$270
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:40 am
PHL
- BOI
1 stop7h 18m
Delta
Tue 7/711:42 pm
BOI
- PHL
1 stop9h 15m
Delta
Deal found 4/23![Delta logo]()
$279
This Alaska Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 5/46:58 pm
PHL
- IDA
1 stop22h 31m
Alaska Airlines
Fri 5/84:06 pm
IDA
- PHL
1 stop11h 56m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:05 am
PHL
- BOI
1 stop10h 33m
Delta
Tue 10/67:30 pm
BOI
- PHL
2 stops13h 10m
Delta
Deal found 4/19![Delta logo]()
$284
This United Airlines deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:00 am
PHL
- IDA
1 stop7h 25m
United Airlines
Tue 6/22:30 pm
IDA
- PHL
2 stops8h 15m
United Airlines
Deal found 4/22![United Airlines logo]()
$433
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:40 am
PHL
- BOI
2 stops8h 35m
Delta
Wed 7/110:29 am
BOI
- PHL
2 stops12h 30m
Delta
Deal found 4/23![Delta logo]()
$290
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:00 am
PHL
- IDA
1 stop9h 43m
United Airlines
Tue 5/122:31 pm
IDA
- PHL
1 stop7h 12m
United Airlines
Deal found 4/23![United Airlines logo]()
$439
This Alaska Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 4/19![Alaska Airlines logo]()
$449
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Sun 5/38:00 am
PHL
- JAC
1 stop9h 18m
United Airlines
Sat 5/97:00 am
JAC
- PHL
1 stop6h 48m
United Airlines
Deal found 4/20![United Airlines logo]()
$441
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:10 am
PHL
- GEG
1 stop8h 01m
Delta
Tue 6/27:23 pm
GEG
- PHL
2 stops13h 27m
Delta
Deal found 4/22![Delta logo]()
$313
This Expedia deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/54:45 pm
PHL
- IDA
1 stop22h 32m
Alaska Airlines
Wed 6/104:14 pm
IDA
- PHL
1 stop21h 09m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:01 pm
PHL
- GEG
1 stop7h 05m
Delta
Sat 5/2312:37 pm
GEG
- PHL
1 stop9h 20m
Delta
Deal found 4/22![Delta logo]()
$320
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:00 am
PHL
- JAC
2 stops12h 58m
United Airlines
Wed 5/67:00 am
JAC
- PHL
1 stop6h 48m
United Airlines
Deal found 4/23![United Airlines logo]()
$495
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:15 am
PHL
- GEG
1 stop9h 52m
Delta
Sat 8/2910:05 am
GEG
- PHL
2 stops9h 55m
Delta
Deal found 4/23![Delta logo]()
$325
This Delta deal was found by Cheapflights users on 4/20. 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 8/52:32 pm
PHL
- GEG
2 stops12h 23m
Delta
Wed 8/126:05 am
GEG
- PHL
2 stops13h 15m
Delta
Deal found 4/20![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 5/48:00 am
PHL
- SUN
1 stop7h 38m
United Airlines
Fri 5/82:30 pm
SUN
- PHL
1 stop7h 13m
United Airlines
Deal found 4/19![United Airlines logo]()
$571
This Alaska Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 6/54:45 pm
PHL
- JAC
2 stops20h 35m
Alaska Airlines
Fri 6/1212:00 pm
JAC
- PHL
1 stop16h 13m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$654
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/298:05 am
PHL
- BOI
2 stops11h 46m
Delta
Sun 8/211:42 pm
BOI
- PHL
1 stop7h 49m
Delta
Deal found 4/23![Delta logo]()
$354
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/294:14 pm
PHL
- WYS
1 stop26h 23m
United Airlines
Tue 6/22:19 pm
WYS
- PHL
2 stops8h 26m
United Airlines
Deal found 4/23![United Airlines logo]()
$610
This Alaska Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:00 am
PHL
- SUN
1 stop28h 39m
Alaska Airlines
Mon 9/710:21 am
SUN
- PHL
2 stops27h 23m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$743
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:55 am
PHL
- WYS
1 stop29h 33m
United Airlines
Tue 5/122:03 pm
WYS
- PHL
1 stop7h 40m
United Airlines
Deal found 4/23![United Airlines logo]()
$636
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:44 pm
PHL
- IDA
2 stops8h 58m
Delta
Wed 6/107:07 pm
IDA
- PHL
2 stops11h 37m
Delta
Deal found 4/23![Delta logo]()
$440
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:45 pm
PHL
- WYS
2 stops19h 47m
United Airlines
Sat 5/302:19 pm
WYS
- PHL
1 stop7h 11m
United Airlines
Deal found 4/23![United Airlines logo]()
$654
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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
- JAC
1 stop7h 32m
Delta
Mon 7/137:40 am
JAC
- PHL
1 stop8h 00m
Delta
Deal found 4/19![Delta logo]()
$447
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated April 23, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated April 23, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/138:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Sun 5/171:22 pm
BOI
- PHL
1 stop14h 15m
Frontier
Deal found 4/23![Frontier logo]()
$248
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:17 am
PHL
- GEG
2 stops10h 54m
Delta
Sat 5/235:37 pm
GEG
- PHL
1 stop9h 00m
Delta
Deal found 4/22![Delta logo]()
$275
This American Airlines deal was found by Cheapflights users on 4/21. 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 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 4/21![American Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/205:17 am
PHL
- GEG
2 stops10h 54m
Delta
Tue 5/264:15 pm
GEG
- PHL
1 stop10h 22m
Delta
Deal found 4/23![Delta logo]()
$313
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Thu 5/217:34 am
PHL
- GEG
1 stop8h 40m
American Airlines
Wed 5/272:08 pm
GEG
- PHL
1 stop7h 23m
American Airlines
Deal found 4/20![American Airlines logo]()
$233
This American Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 5/217:34 am
PHL
- GEG
1 stop8h 40m
American Airlines
Mon 6/12:08 pm
GEG
- PHL
1 stop7h 23m
American Airlines
Deal found 4/19![American Airlines logo]()
$312
This Booking.com deal was found by Cheapflights users on 4/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Tue 5/261:25 pm
BOI
- PHL
1 stop14h 12m
Frontier
Deal found 4/21![Frontier logo]()
$238
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Sun 5/248:20 am
PHL
- JAC
1 stop8h 49m
American Airlines
Fri 5/293:49 pm
JAC
- PHL
1 stop6h 42m
American Airlines
Deal found 4/20![American Airlines logo]()
$306
This Mytrip deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 5/258:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Tue 6/21:25 pm
BOI
- PHL
1 stop14h 12m
Frontier
Deal found 4/19![Frontier logo]()
$196
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Mon 5/255:00 am
PHL
- JAC
1 stop7h 27m
American Airlines
Thu 5/2811:07 am
JAC
- PHL
1 stop8h 53m
American Airlines
Deal found 4/20![American Airlines logo]()
$233
This Delta deal was found by Cheapflights users on 4/21. 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.
Tue 5/265:45 am
PHL
- BOI
1 stop9h 33m
Delta
Thu 5/286:00 pm
BOI
- PHL
1 stop9h 37m
Delta
Deal found 4/21![Delta logo]()
$209
This American Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 5/298:20 am
PHL
- BOI
1 stop8h 47m
American Airlines
Sun 5/313:11 pm
BOI
- PHL
1 stop7h 32m
American Airlines
Deal found 4/19![American Airlines logo]()
$314
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 April 23, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
This American Airlines deal was found by Cheapflights users on 4/20. 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 6/94:17 pm
PHL
- GEG
1 stop9h 52m
American Airlines
Deal found 4/20![American Airlines logo]()
$94
This Delta deal was found by Cheapflights users on 4/20. 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.
Tue 5/127:01 pm
PHL
- BOI
1 stop6h 45m
Delta
Deal found 4/20![Delta logo]()
$99
This Delta deal was found by Cheapflights users on 4/20. 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.
Tue 6/93:38 pm
PHL
- GEG
2 stops11h 21m
Delta
Deal found 4/20![Delta logo]()
$104
This Delta deal was found by Cheapflights users on 4/20. 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.
Mon 5/117:01 pm
PHL
- BOI
1 stop6h 45m
Delta
Deal found 4/20![Delta logo]()
$111
This Southwest deal was found by Cheapflights users on 4/20. 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 8/125:10 pm
PHL
- GEG
1 stop8h 15m
Southwest
Deal found 4/20![Southwest logo]()
$114
This Booking.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1312:42 pm
PHL
- BOI
1 stop25h 48m
Frontier
Deal found 4/23![Frontier logo]()
$125
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:15 am
PHL
- GEG
1 stop9h 52m
Delta
Deal found 4/22![Delta logo]()
$128
This Delta deal was found by Cheapflights users on 4/20. 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.
Sat 6/276:00 am
PHL
- GEG
1 stop8h 36m
Delta
Deal found 4/20![Delta logo]()
$140
This Delta deal was found by Cheapflights users on 4/21. 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 5/247:10 am
PHL
- BOI
1 stop9h 50m
Delta
Deal found 4/21![Delta logo]()
$140
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Wed 5/208:40 am
PHL
- GEG
1 stop8h 39m
American Airlines
Deal found 4/20![American Airlines logo]()
$143
This Delta deal was found by Cheapflights users on 4/20. 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.
Thu 6/255:22 pm
PHL
- GEG
2 stops9h 37m
Delta
Deal found 4/20![Delta logo]()
$145
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 6/138:30 am
PHL
- BOI
2 stops14h 42m
Delta
Deal found 4/19![Delta logo]()
$145
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 April 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $196 (Mytrip) |
One-way from | $94 (American Airlines) |
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 April 23, 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
Wed 6/3
5:18 pm-11:35 pm
2 stops9h 17m
Spokane
Wed 6/10
4:30 pm-5:45 am
1 stop10h 15m
$202
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 6/3
12:38 pm-11:35 pm
2 stops13h 57m
Spokane
Thu 6/11
5:05 pm-8:44 am
2 stops12h 39m
$249
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Thu 6/4
4:06 pm-10:28 pm
1 stop8h 22m
Boise Air Term. Gowen Fld
Thu 6/11
6:08 pm-5:45 am
1 stop9h 37m
$250
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Sat 8/22
7:05 am-3:38 pm
1 stop10h 33m
Boise Air Term. Gowen Fld
Sat 8/29
3:25 pm-11:40 pm
1 stop6h 15m
$270
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Fri 7/3
5:40 am-10:58 am
1 stop7h 18m
Boise Air Term. Gowen Fld
Tue 7/7
11:42 pm-10:57 am
1 stop9h 15m
$279
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Thu 10/1
7:05 am-3:38 pm
1 stop10h 33m
Boise Air Term. Gowen Fld
Tue 10/6
7:30 pm-10:40 am
2 stops13h 10m
$284
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Wed 6/24
5:40 am-12:15 pm
2 stops8h 35m
Boise Air Term. Gowen Fld
Wed 7/1
10:29 am-12:59 am
2 stops12h 30m
$290
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Mon 6/1
7:10 am-12:11 pm
1 stop8h 01m
Spokane
Tue 6/2
7:23 pm-11:50 am
2 stops13h 27m
$313
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 5/19
7:01 pm-11:06 pm
1 stop7h 05m
Spokane
Sat 5/23
12:37 pm-12:57 am
1 stop9h 20m
$320
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 8/22
6:15 am-1:07 pm
1 stop9h 52m
Spokane
Sat 8/29
10:05 am-11:00 pm
2 stops9h 55m
$325
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-SUN
PHL-IDA
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-SUN
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 41 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 April 23, 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
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
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 April 23, 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 April 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$488 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$491 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$577 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$371 | Average$485 | FlexibilityNo cancel fee | On-time63% |