$99+ 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Jul 11 — Jul 181
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 June 11, 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 June 11, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 8/207:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/2410:56 pm
GEG
- PHL
1 stop9h 09m
Delta
Deal found 6/10![Delta logo]()
$221
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 8/229:35 am
PHL
- BOI
1 stop9h 14m
American Airlines
Sat 8/292:58 pm
BOI
- PHL
1 stop7h 01m
American Airlines
Deal found 6/11![American Airlines logo]()
$221
This Delta deal was found by Cheapflights users on 6/8. 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 9/47:05 am
PHL
- GEG
1 stop11h 14m
Delta
Tue 9/85:40 pm
GEG
- PHL
1 stop9h 25m
Delta
Deal found 6/8![Delta logo]()
$238
This Delta deal was found by Cheapflights users on 6/10. 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 8/47:05 am
PHL
- BOI
1 stop10h 13m
Delta
Thu 8/66:45 pm
BOI
- PHL
1 stop9h 20m
Delta
Deal found 6/10![Delta logo]()
$238
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 9/177:05 am
PHL
- GEG
1 stop8h 15m
Delta
Sun 9/205:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 6/10![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 6/10. 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 7/297:05 am
PHL
- BOI
1 stop10h 06m
Delta
Thu 8/66:45 pm
BOI
- PHL
1 stop9h 20m
Delta
Deal found 6/10![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 6/10. 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 8/47:05 am
PHL
- BOI
1 stop10h 13m
Delta
Fri 8/146:45 pm
BOI
- PHL
1 stop9h 20m
Delta
Deal found 6/10![Delta logo]()
$255
This Delta deal was found by Cheapflights users on 6/10. 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.
Sun 7/265:40 am
PHL
- BOI
1 stop7h 17m
Delta
Tue 8/45:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Deal found 6/10![Delta logo]()
$258
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 8/207:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/315:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 6/10![Delta logo]()
$260
This Delta deal was found by Cheapflights users on 6/10. 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 7/297:05 am
PHL
- BOI
1 stop10h 06m
Delta
Mon 8/107:28 pm
BOI
- PHL
1 stop8h 22m
Delta
Deal found 6/10![Delta logo]()
$267
This Delta deal was found by Cheapflights users on 6/10. 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.
Sun 7/265:40 am
PHL
- BOI
1 stop7h 17m
Delta
Thu 8/66:45 pm
BOI
- PHL
1 stop9h 20m
Delta
Deal found 6/10![Delta logo]()
$270
This Delta deal was found by Cheapflights users on 6/10. 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 6/246:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Wed 7/225:37 pm
GEG
- PHL
1 stop8h 52m
Delta
Deal found 6/10![Delta logo]()
$279
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 June 11, 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 June 11, 2026.
This Delta deal was found by Cheapflights users on 6/7. 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 8/227:05 am
PHL
- BOI
1 stop10h 13m
Delta
Sat 8/295:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Deal found 6/7![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 6/10. 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 8/125:10 pm
PHL
- GEG
1 stop8h 15m
Southwest
Wed 8/197:30 am
GEG
- PHL
2 stops10h 05m
Southwest
Deal found 6/10![Southwest logo]()
$326
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Sun 8/307:02 am
PHL
- GEG
1 stop10h 45m
Alaska Airlines
Thu 9/35:12 am
GEG
- PHL
1 stop7h 33m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 6/9. 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 8/225:01 pm
PHL
- BOI
1 stop7h 52m
United Airlines
Sat 8/297:05 pm
BOI
- PHL
2 stops15h 18m
United Airlines
Deal found 6/9![United Airlines logo]()
$370
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:05 am
PHL
- GEG
1 stop8h 03m
Delta
Tue 9/85:40 pm
GEG
- PHL
1 stop9h 25m
Delta
Deal found 6/6![Delta logo]()
$289
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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
- BOI
1 stop9h 38m
Delta
Tue 7/142:50 pm
BOI
- PHL
1 stop7h 06m
Delta
Deal found 6/6![Delta logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Thu 6/258:37 pm
PHL
- TWF
2 stops17h 23m
Multiple Airlines
Mon 6/291:45 pm
TWF
- PHL
1 stop14h 42m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$641
This Southwest deal was found by Cheapflights users on 6/8. 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 7/154:35 pm
PHL
- BOI
2 stops9h 55m
Southwest
Wed 7/294:05 pm
BOI
- PHL
1 stop7h 00m
Southwest
Deal found 6/8![Southwest logo]()
$339
This Delta deal was found by Cheapflights users on 6/10. 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 8/126:55 pm
PHL
- GEG
1 stop7h 14m
Delta
Thu 8/205:30 am
GEG
- PHL
1 stop9h 17m
Delta
Deal found 6/10![Delta logo]()
$312
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:10 pm
PHL
- GEG
2 stops10h 45m
Southwest
Mon 9/2110:55 am
GEG
- PHL
1 stop7h 10m
Southwest
Deal found 6/10![Southwest logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 8/297:02 am
PHL
- BOI
1 stop10h 29m
Alaska Airlines
Tue 9/16:00 am
BOI
- PHL
1 stop7h 45m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 8/291:30 pm
PHL
- BOI
2 stops11h 10m
United Airlines
Tue 9/17:05 pm
BOI
- PHL
2 stops13h 02m
United Airlines
Deal found 6/6![United Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 6/255:46 pm
PHL
- BOI
1 stop8h 02m
Alaska Airlines
Mon 6/298:28 pm
BOI
- PHL
1 stop16h 55m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 6/9. 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 8/66:05 pm
PHL
- GEG
1 stop7h 35m
Southwest
Thu 8/136:55 am
GEG
- PHL
2 stops11h 10m
Southwest
Deal found 6/9![Southwest logo]()
$359
This Delta deal was found by Cheapflights users on 6/11. 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 7/96:55 pm
PHL
- GEG
1 stop8h 00m
Delta
Mon 7/204:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Deal found 6/11![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/155:15 am
PHL
- BOI
1 stop12h 10m
Southwest
Tue 7/2110:40 am
BOI
- PHL
2 stops10h 15m
Southwest
Deal found 6/6![Southwest logo]()
$380
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Sat 9/56:59 pm
PHL
- JAC
1 stop18h 16m
Alaska Airlines
Sat 9/122:10 pm
JAC
- PHL
1 stop23h 35m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 6/256:00 am
PHL
- BOI
1 stop7h 27m
United Airlines
Mon 6/297:05 pm
BOI
- PHL
1 stop10h 45m
United Airlines
Deal found 6/6![United Airlines logo]()
$484
This Alaska Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 9/44:48 pm
PHL
- GEG
1 stop9h 23m
Alaska Airlines
Tue 9/85:12 am
GEG
- PHL
2 stops21h 28m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$426
This Southwest deal was found by Cheapflights users on 6/9. 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 8/76:05 pm
PHL
- GEG
1 stop7h 35m
Southwest
Wed 8/126:15 am
GEG
- PHL
2 stops11h 20m
Southwest
Deal found 6/9![Southwest logo]()
$392
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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
Sat 7/1111:53 am
BOI
- PHL
2 stops9h 28m
Delta
Deal found 6/6![Delta logo]()
$401
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:00 am
PHL
- JAC
1 stop7h 12m
United Airlines
Wed 11/182:40 pm
JAC
- PHL
1 stop6h 06m
United Airlines
Deal found 6/10![United Airlines logo]()
$488
This Southwest deal was found by Cheapflights users on 6/10. 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 8/55:10 pm
PHL
- GEG
1 stop8h 15m
Southwest
Sun 8/97:05 am
GEG
- PHL
2 stops10h 05m
Southwest
Deal found 6/10![Southwest logo]()
$399
This United Airlines deal was found by Cheapflights users on 6/10. 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 10/318:00 am
PHL
- SUN
1 stop7h 44m
United Airlines
Wed 11/42:29 pm
SUN
- PHL
1 stop6h 17m
United Airlines
Deal found 6/10![United Airlines logo]()
$511
This Delta deal was found by Cheapflights users on 6/7. 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.
Tue 7/216:57 pm
PHL
- GEG
1 stop7h 09m
Delta
Tue 7/284:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Deal found 6/7![Delta logo]()
$427
This Alaska Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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.
Sun 9/134:48 pm
PHL
- IDA
1 stop22h 36m
Alaska Airlines
Fri 9/256:18 am
IDA
- PHL
1 stop8h 49m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$509
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Sat 8/226:25 am
PHL
- IDA
1 stop7h 13m
United Airlines
Fri 8/282:25 pm
IDA
- PHL
1 stop7h 20m
United Airlines
Deal found 6/7![United Airlines logo]()
$514
This Southwest deal was found by Cheapflights users on 6/9. 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 7/244:45 pm
PHL
- GEG
2 stops10h 50m
Southwest
Tue 7/285:00 am
GEG
- PHL
2 stops10h 40m
Southwest
Deal found 6/9![Southwest logo]()
$425
This Delta deal was found by Cheapflights users on 6/7. 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 7/47:23 am
PHL
- IDA
1 stop9h 14m
Delta
Thu 7/97:00 pm
IDA
- PHL
1 stop9h 15m
Delta
Deal found 6/7![Delta logo]()
$439
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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.
Wed 7/297:33 am
PHL
- IDA
1 stop10h 04m
Alaska Airlines
Wed 8/51:43 pm
IDA
- PHL
1 stop14h 30m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$509
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated June 11, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated June 11, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/8. 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 6/196:51 pm
PHL
- BOI
1 stop7h 18m
Delta
Mon 6/226:42 pm
BOI
- PHL
1 stop9h 26m
Delta
Deal found 6/8![Delta logo]()
$293
This Delta deal was found by Cheapflights users on 6/10. 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 6/246:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Wed 7/225:37 pm
GEG
- PHL
1 stop8h 52m
Delta
Deal found 6/10![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/47:23 am
PHL
- BOI
1 stop6h 52m
Delta
Wed 7/156:07 pm
BOI
- PHL
1 stop9h 22m
Delta
Deal found 6/6![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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
- BOI
1 stop9h 38m
Delta
Tue 7/142:50 pm
BOI
- PHL
1 stop7h 06m
Delta
Deal found 6/6![Delta logo]()
$289
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 7/95:40 am
PHL
- BOI
1 stop7h 17m
Delta
Thu 7/166:07 pm
BOI
- PHL
1 stop9h 22m
Delta
Deal found 6/10![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 6/11. 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 7/175:40 am
PHL
- GEG
1 stop8h 59m
Delta
Mon 7/204:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Deal found 6/11![Delta logo]()
$299
This Delta deal was found by Cheapflights users on 6/10. 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.
Sun 7/265:40 am
PHL
- BOI
1 stop7h 17m
Delta
Tue 8/45:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Deal found 6/10![Delta logo]()
$258
This Delta deal was found by Cheapflights users on 6/10. 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.
Sun 7/265:40 am
PHL
- BOI
1 stop7h 17m
Delta
Thu 8/66:45 pm
BOI
- PHL
1 stop9h 20m
Delta
Deal found 6/10![Delta logo]()
$270
This Delta deal was found by Cheapflights users on 6/10. 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 7/297:05 am
PHL
- BOI
1 stop10h 06m
Delta
Tue 8/45:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Deal found 6/10![Delta logo]()
$238
This Delta deal was found by Cheapflights users on 6/10. 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 7/297:05 am
PHL
- BOI
1 stop10h 06m
Delta
Thu 8/66:45 pm
BOI
- PHL
1 stop9h 20m
Delta
Deal found 6/10![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 6/10. 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 7/295:40 am
PHL
- BOI
1 stop7h 17m
Delta
Tue 8/115:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Deal found 6/10![Delta logo]()
$267
This Delta deal was found by Cheapflights users on 6/10. 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.
Fri 7/314:08 pm
PHL
- BOI
1 stop7h 49m
Delta
Fri 8/77:28 pm
BOI
- PHL
1 stop8h 22m
Delta
Deal found 6/10![Delta logo]()
$287
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 June 11, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:40 pm
PHL
- BOI
1 stop7h 24m
Delta
Deal found 6/8![Delta logo]()
$99
This Delta deal was found by Cheapflights users on 6/9. 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.
Mon 11/27:05 am
PHL
- BOI
1 stop9h 17m
Delta
Deal found 6/9![Delta logo]()
$111
This Delta deal was found by Cheapflights users on 6/11. 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 8/147:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 6/11![Delta logo]()
$128
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:15 am
PHL
- BOI
1 stop9h 39m
Delta
Deal found 6/8![Delta logo]()
$140
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 6/208:00 am
PHL
- BOI
1 stop7h 34m
United Airlines
Deal found 6/6![United Airlines logo]()
$145
This Delta deal was found by Cheapflights users on 6/10. 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 6/206:00 am
PHL
- BOI
1 stop8h 54m
Delta
Deal found 6/10![Delta logo]()
$154
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sun 8/2311:03 am
PHL
- JAC
1 stop9h 38m
United Airlines
Deal found 6/8![United Airlines logo]()
$156
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:24 pm
PHL
- BOI
2 stops10h 11m
United Airlines
Deal found 6/8![United Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 6/10. 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.
Fri 8/77:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Deal found 6/10![Delta logo]()
$160
This Delta deal was found by Cheapflights users on 6/11. 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 7/175:40 am
PHL
- BOI
1 stop7h 17m
Delta
Deal found 6/11![Delta logo]()
$160
This Delta deal was found by Cheapflights users on 6/10. 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 6/176:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 6/10![Delta logo]()
$162
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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 7/117:33 am
PHL
- GEG
1 stop7h 53m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$167
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 June 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $221 (Delta) |
One-way from | $99 (Delta) |
Popular in | June |
Cheapest in | September |
Average price | $592 |
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 June 11, 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
7:05 am-3:18 pm
1 stop10h 13m
Boise Air Term. Gowen Fld
Sat 8/29
5:59 pm-5:50 am
1 stop9h 51m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Fri 9/4
7:05 am-12:08 pm
1 stop8h 03m
Spokane
Tue 9/8
5:40 pm-6:05 am
1 stop9h 25m
$289
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 7/7
5:15 am-12:53 pm
1 stop9h 38m
Boise Air Term. Gowen Fld
Tue 7/14
2:50 pm-11:56 pm
1 stop7h 06m
$289
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 8/12
6:55 pm-11:09 pm
1 stop7h 14m
Spokane
Thu 8/20
5:30 am-5:47 pm
1 stop9h 17m
$312
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 8/12
5:10 pm-10:25 pm
1 stop8h 15m
Spokane
Wed 8/19
7:30 am-8:35 pm
2 stops10h 05m
$326
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Wed 7/15
4:35 pm-12:30 am
2 stops9h 55m
Boise Air Term. Gowen Fld
Wed 7/29
4:05 pm-1:05 am
1 stop7h 00m
$339
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 9/12
1:10 pm-8:55 pm
2 stops10h 45m
Spokane
Mon 9/21
10:55 am-9:05 pm
1 stop7h 10m
$347
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sun 8/30
7:02 am-2:47 pm
1 stop10h 45m
Spokane
Thu 9/3
5:12 am-3:45 pm
1 stop7h 33m
$349
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 8/6
6:05 pm-10:40 pm
1 stop7h 35m
Spokane
Thu 8/13
6:55 am-9:05 pm
2 stops11h 10m
$359
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 7/9
6:55 pm-11:55 pm
1 stop8h 00m
Spokane
Mon 7/20
4:30 pm-5:29 am
1 stop9h 59m
$359
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
What is the cheapest month to book a flight from Philadelphia to Idaho?
Currently, May is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $148). 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.
Weekly flight availability from Philadelphia to Idaho
Explore weekly flight availability from Philadelphia to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 11, 2026.
The most flights from PHL to USID are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).
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 89 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 June 11, 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.
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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 June 11, 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 June 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$497 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$513 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$336 | Average$605 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$350 | Average$556 | FlexibilityNo cancel fee | On-time63% |