$101+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Aug 11 — Aug 181
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 12, 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 12, 2026.
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:25 am
PHL
- BOI
1 stop7h 24m
Delta
Sat 8/292:53 pm
BOI
- PHL
1 stop7h 03m
Delta
Deal found 7/8![Delta logo]()
$201
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Wed 8/264:20 pm
GEG
- PHL
1 stop10h 30m
Delta
Deal found 7/8![Delta logo]()
$207
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Mon 8/246:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Deal found 7/8![Southwest logo]()
$212
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/261:45 pm
PHL
- GEG
2 stops11h 20m
Southwest
Mon 8/316:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Deal found 7/9![Southwest logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:37 pm
PHL
- BOI
1 stop17h 52m
Frontier
Thu 8/2012:24 pm
BOI
- PHL
1 stop15h 15m
Frontier
Deal found 7/11![Frontier logo]()
$216
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
PHL
- BOI
2 stops9h 40m
Southwest
Tue 8/2512:35 pm
BOI
- PHL
1 stop9h 15m
Southwest
Deal found 7/8![Southwest logo]()
$224
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/76:55 pm
PHL
- BOI
1 stop7h 04m
Delta
Mon 8/1011:10 pm
BOI
- PHL
1 stop8h 28m
Delta
Deal found 7/7![Delta logo]()
$226
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:58 pm
PHL
- GEG
1 stop8h 32m
Delta
Mon 8/2410:56 pm
GEG
- PHL
1 stop7h 42m
Delta
Deal found 7/8![Delta logo]()
$233
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:50 pm
PHL
- BOI
1 stop6h 40m
Southwest
Sat 8/297:45 am
BOI
- PHL
2 stops11h 00m
Southwest
Deal found 7/9![Southwest logo]()
$241
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:05 pm
PHL
- BOI
2 stops9h 30m
Southwest
Mon 8/3111:30 am
BOI
- PHL
2 stops8h 10m
Southwest
Deal found 7/9![Southwest logo]()
$246
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:55 pm
PHL
- GEG
1 stop7h 14m
Delta
Tue 8/256:45 am
GEG
- PHL
1 stop8h 14m
Delta
Deal found 7/8![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/32:31 pm
PHL
- BOI
1 stop9h 26m
Delta
Sat 9/192:50 pm
BOI
- PHL
1 stop7h 06m
Delta
Deal found 7/8![Delta logo]()
$251
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 12, 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 12, 2026.
This Delta deal was found by Cheapflights users on 7/10. 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.
Sat 8/227:25 am
PHL
- BOI
1 stop7h 24m
Delta
Sat 8/292:53 pm
BOI
- PHL
1 stop7h 03m
Delta
Deal found 7/10![Delta logo]()
$201
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Wed 11/1111:24 am
PHL
- GEG
2 stops12h 41m
United Airlines
Wed 11/181:49 pm
GEG
- PHL
1 stop6h 57m
United Airlines
Deal found 7/10![United Airlines logo]()
$264
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Wed 8/267:00 am
GEG
- PHL
2 stops10h 55m
Southwest
Deal found 7/8![Southwest logo]()
$291
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/2410:56 pm
GEG
- PHL
1 stop9h 05m
Delta
Deal found 7/8![Delta logo]()
$207
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/315:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 7/9![Delta logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:48 pm
PHL
- IDA
1 stop22h 36m
Alaska Airlines
Tue 8/253:57 pm
IDA
- PHL
1 stop21h 48m
Alaska Airlines
Deal found 7/8![Alaska Airlines logo]()
$474
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 10/195:20 am
PHL
- BOI
1 stop11h 45m
Southwest
Wed 10/2112:55 pm
BOI
- PHL
1 stop8h 35m
Southwest
Deal found 7/7![Southwest logo]()
$303
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/65:15 am
PHL
- BOI
1 stop9h 34m
Delta
Mon 8/1011:10 pm
BOI
- PHL
1 stop8h 28m
Delta
Deal found 7/7![Delta logo]()
$260
This Southwest deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:05 pm
PHL
- BOI
1 stop8h 30m
Southwest
Mon 8/312:55 pm
BOI
- PHL
1 stop6h 50m
Southwest
Deal found 7/11![Southwest logo]()
$330
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/246:00 am
PHL
- BOI
1 stop11h 31m
United Airlines
Mon 9/286:50 pm
BOI
- PHL
1 stop10h 59m
United Airlines
Deal found 7/7![United Airlines logo]()
$365
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:55 pm
PHL
- GEG
1 stop7h 14m
Delta
Fri 8/282:05 pm
GEG
- PHL
1 stop6h 51m
Delta
Deal found 7/8![Delta logo]()
$279
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2210:34 am
PHL
- BOI
2 stops14h 06m
United Airlines
Sat 8/2912:24 pm
BOI
- PHL
1 stop7h 19m
United Airlines
Deal found 7/10![United Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Thu 8/277:15 pm
GEG
- PHL
1 stop7h 50m
Delta
Deal found 7/9![Delta logo]()
$283
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/282:10 pm
PHL
- BOI
2 stops10h 25m
Southwest
Sun 8/306:00 am
BOI
- PHL
2 stops9h 05m
Southwest
Deal found 7/9![Southwest logo]()
$365
This Delta deal was found by Cheapflights users on 7/12. 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 9/87:05 am
PHL
- GEG
1 stop8h 15m
Delta
Tue 9/85:49 pm
GEG
- PHL
1 stop9h 01m
Delta
Deal found 7/12![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/162:45 pm
PHL
- GEG
2 stops10h 40m
Southwest
Sun 9/207:05 am
GEG
- PHL
2 stops10h 05m
Southwest
Deal found 7/10![Southwest logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 11/34:25 pm
PHL
- IDA
1 stop22h 51m
Alaska Airlines
Sat 11/76:04 am
IDA
- PHL
1 stop8h 45m
Alaska Airlines
Deal found 7/7![Alaska Airlines logo]()
$501
This Delta deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/242:05 pm
GEG
- PHL
1 stop6h 51m
Delta
Deal found 7/11![Delta logo]()
$289
This United Airlines deal was found by Cheapflights users on 7/12. 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 8/86:00 am
PHL
- IDA
1 stop7h 45m
United Airlines
Fri 8/142:25 pm
IDA
- PHL
1 stop7h 19m
United Airlines
Deal found 7/12![United Airlines logo]()
$452
This Alaska Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:02 am
PHL
- JAC
1 stop30h 13m
Alaska Airlines
Sat 9/122:10 pm
JAC
- PHL
1 stop23h 35m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$502
This Southwest deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am
PHL
- GEG
1 stop7h 15m
Southwest
Tue 9/81:55 pm
GEG
- PHL
1 stop6h 55m
Southwest
Deal found 7/12![Southwest logo]()
$389
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 10/105:45 am
PHL
- BOI
1 stop8h 43m
Delta
Sun 10/185:30 am
BOI
- PHL
1 stop6h 29m
Delta
Deal found 7/7![Delta logo]()
$293
This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:25 am
PHL
- IDA
1 stop7h 13m
United Airlines
Sat 8/2910:35 am
IDA
- PHL
2 stops12h 24m
United Airlines
Deal found 7/9![United Airlines logo]()
$457
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 10/16:55 pm
PHL
- BOI
1 stop7h 03m
Delta
Thu 10/85:59 pm
BOI
- PHL
1 stop9h 46m
Delta
Deal found 7/7![Delta logo]()
$301
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/62:05 pm
PHL
- GEG
1 stop11h 35m
Southwest
Mon 8/1010:55 am
GEG
- PHL
1 stop9h 50m
Southwest
Deal found 7/7![Southwest logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:02 am
PHL
- SUN
1 stop28h 37m
Alaska Airlines
Sat 9/510:21 am
SUN
- PHL
1 stop17h 19m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$555
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:00 am
PHL
- SUN
1 stop7h 48m
United Airlines
Fri 9/47:50 am
SUN
- PHL
1 stop8h 04m
United Airlines
Deal found 7/8![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:16 am
PHL
- WYS
2 stops11h 10m
United Airlines
Tue 8/251:55 pm
WYS
- PHL
2 stops9h 04m
United Airlines
Deal found 7/8![United Airlines logo]()
$460
This Delta deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Fri 8/212:05 pm
GEG
- PHL
1 stop6h 51m
Delta
Deal found 7/11![Delta logo]()
$322
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1011:20 am
PHL
- SUN
2 stops12h 05m
United Airlines
Sat 10/172:38 pm
SUN
- PHL
1 stop6h 42m
United Airlines
Deal found 7/8![United Airlines logo]()
$464
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated July 12, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated July 12, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/76:55 pm
PHL
- BOI
1 stop7h 04m
Delta
Mon 8/1011:10 pm
BOI
- PHL
1 stop8h 28m
Delta
Deal found 7/7![Delta logo]()
$226
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Wed 8/264:20 pm
GEG
- PHL
1 stop10h 30m
Delta
Deal found 7/8![Delta logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:37 pm
PHL
- BOI
1 stop17h 52m
Frontier
Thu 8/2012:24 pm
BOI
- PHL
1 stop15h 15m
Frontier
Deal found 7/11![Frontier logo]()
$216
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/183:05 pm
PHL
- BOI
2 stops10h 05m
Southwest
Tue 8/2512:35 pm
BOI
- PHL
1 stop9h 15m
Southwest
Deal found 7/10![Southwest logo]()
$256
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
PHL
- BOI
2 stops9h 40m
Southwest
Tue 8/2512:35 pm
BOI
- PHL
1 stop9h 15m
Southwest
Deal found 7/8![Southwest logo]()
$224
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:55 pm
PHL
- GEG
1 stop7h 14m
Delta
Tue 8/256:45 am
GEG
- PHL
1 stop8h 14m
Delta
Deal found 7/8![Delta logo]()
$250
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Mon 8/246:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Deal found 7/8![Southwest logo]()
$212
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:58 pm
PHL
- GEG
1 stop8h 32m
Delta
Mon 8/2410:56 pm
GEG
- PHL
1 stop7h 42m
Delta
Deal found 7/8![Delta logo]()
$233
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:25 am
PHL
- BOI
1 stop7h 24m
Delta
Sat 8/292:53 pm
BOI
- PHL
1 stop7h 03m
Delta
Deal found 7/8![Delta logo]()
$201
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:50 pm
PHL
- BOI
1 stop6h 40m
Southwest
Sat 8/297:45 am
BOI
- PHL
2 stops11h 00m
Southwest
Deal found 7/9![Southwest logo]()
$241
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/261:45 pm
PHL
- GEG
2 stops11h 20m
Southwest
Mon 8/316:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Deal found 7/9![Southwest logo]()
$216
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:05 pm
PHL
- BOI
2 stops9h 30m
Southwest
Mon 8/3111:30 am
BOI
- PHL
2 stops8h 10m
Southwest
Deal found 7/9![Southwest logo]()
$246
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 12, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated July 12, 2026.
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:15 am
PHL
- BOI
1 stop9h 34m
Delta
Deal found 7/9![Delta logo]()
$101
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:05 am
PHL
- GEG
1 stop8h 15m
Delta
Deal found 7/8![Delta logo]()
$104
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:10 pm
PHL
- BOI
2 stops10h 20m
Southwest
Deal found 7/9![Southwest logo]()
$106
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/62:05 pm
PHL
- GEG
1 stop11h 35m
Southwest
Deal found 7/8![Southwest logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/108:37 pm
PHL
- BOI
1 stop17h 52m
Frontier
Deal found 7/9![Frontier logo]()
$110
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:44 pm
PHL
- BOI
1 stop16h 44m
Frontier
Deal found 7/11![Frontier logo]()
$111
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/165:05 am
PHL
- BOI
1 stop7h 55m
Southwest
Deal found 7/8![Southwest logo]()
$118
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/244:05 pm
PHL
- BOI
2 stops9h 30m
Southwest
Deal found 7/10![Southwest logo]()
$123
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/143:58 pm
PHL
- BOI
1 stop7h 59m
Delta
Deal found 7/8![Delta logo]()
$126
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Deal found 7/8![Delta logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/264:45 pm
PHL
- BOI
2 stops20h 44m
Frontier
Deal found 7/10![Frontier logo]()
$139
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:20 am
PHL
- TWF
1 stop7h 03m
Delta
Deal found 7/9![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 July 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $201 (Delta) |
One-way from | $101 (Delta) |
Popular in | June |
Cheapest in | September |
Average price | $498 |
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 12, 2026.
Use the filters below to find and compare flights from Philadelphia to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Sat 8/22
7:25 am-12:49 pm
1 stop7h 24m
Boise Air Term. Gowen Fld
Sat 8/29
2:53 pm-11:56 pm
1 stop7h 03m
$201
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 8/20
7:00 pm-11:53 pm
1 stop7h 53m
Spokane
Mon 8/24
10:56 pm-11:01 am
1 stop9h 05m
$207
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
$207
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Thu 8/6
5:15 am-12:49 pm
1 stop9h 34m
Boise Air Term. Gowen Fld
Mon 8/10
11:10 pm-9:38 am
1 stop8h 28m
$260
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 11/11
11:24 am-9:05 pm
2 stops12h 41m
Spokane
Wed 11/18
1:49 pm-11:46 pm
1 stop6h 57m
$264
Quickest round-trip
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 8/19
6:55 pm-11:09 pm
1 stop7h 14m
Spokane
Fri 8/28
2:05 pm-11:56 pm
1 stop6h 51m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sun 8/9
7:00 pm-11:53 pm
1 stop7h 53m
Spokane
Thu 8/27
7:15 pm-6:05 am
1 stop7h 50m
$283
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 9/8
7:05 am-12:20 pm
1 stop8h 15m
Spokane
Tue 9/8
5:49 pm-5:50 am
1 stop9h 01m
$289
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Mon 8/17
7:00 pm-11:53 pm
1 stop7h 53m
Spokane
Mon 8/24
2:05 pm-11:56 pm
1 stop6h 51m
$289
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 8/20
4:05 pm-11:15 pm
2 stops10h 10m
Spokane
Wed 8/26
7:00 am-8:55 pm
2 stops10h 55m
$291
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-TWF
PHL-JAC
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-TWF
PHL-JAC
What is the cheapest month to book a flight from Philadelphia to Idaho?
Currently, July is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $123). 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?
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 12, 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.
Food
7.0
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
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
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 July 12, 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 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$200 | Average$521 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$516 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$318 | Average$592 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$350 | Average$556 | FlexibilityNo cancel fee | On-time63% |