$86+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
May 10 — May 171
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 April 10, 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 10, 2026.
This Frontier deal was found by Cheapflights users on 4/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Sun 5/171:22 pm
BOI
- PHL
1 stop14h 15m
Frontier
Deal found 4/7![Frontier logo]()
$186
This Trip.com deal was found by Cheapflights users on 4/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:41 pm
PHL
- GEG
1 stop17h 08m
Frontier
Sun 4/2611:44 am
GEG
- PHL
1 stop14h 50m
Frontier
Deal found 4/7![Frontier logo]()
$217
This Mytrip deal was found by Cheapflights users on 4/9. 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 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 4/9![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 4/9. 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.
Sun 5/249:12 pm
PHL
- BOI
2 stops41h 18m
Frontier
Tue 6/21:25 pm
BOI
- PHL
1 stop14h 12m
Frontier
Deal found 4/9![Frontier logo]()
$272
This Alaska Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/57:22 am
PHL
- BOI
1 stop10h 11m
Alaska Airlines
Tue 5/56:08 pm
BOI
- PHL
1 stop9h 54m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$273
This Delta deal was found by Cheapflights users on 4/9. 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 5/46:05 am
PHL
- GEG
1 stop9h 59m
Delta
Tue 5/127:23 pm
GEG
- PHL
1 stop7h 14m
Delta
Deal found 4/9![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 8/226:45 am
PHL
- BOI
1 stop7h 39m
Delta
Thu 8/275:40 am
BOI
- PHL
1 stop6h 20m
Delta
Deal found 4/5![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 4/6. 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.
Wed 6/35:17 am
PHL
- GEG
2 stops10h 54m
Delta
Wed 6/102:23 pm
GEG
- PHL
1 stop6h 36m
Delta
Deal found 4/6![Delta logo]()
$284
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/55:50 am
PHL
- BOI
2 stops9h 30m
Southwest
Tue 5/53:15 pm
BOI
- PHL
1 stop6h 40m
Southwest
Deal found 4/5![Southwest logo]()
$284
This American Airlines deal was found by Cheapflights users on 4/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:30 pm
PHL
- GEG
1 stop8h 40m
American Airlines
Wed 5/131:13 pm
GEG
- PHL
1 stop7h 46m
American Airlines
Deal found 4/7![American Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 4/6. 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.
Mon 4/275:40 am
PHL
- GEG
2 stops11h 30m
Southwest
Wed 4/295:10 am
GEG
- PHL
2 stops9h 40m
Southwest
Deal found 4/6![Southwest logo]()
$289
This Delta deal was found by Cheapflights users on 4/6. 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.
Wed 6/33:44 pm
PHL
- GEG
2 stops10h 51m
Delta
Thu 6/114:30 pm
GEG
- PHL
2 stops10h 38m
Delta
Deal found 4/6![Delta logo]()
$290
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 10, 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 10, 2026.
This Delta deal was found by Cheapflights users on 4/9. 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 5/97:10 am
PHL
- GEG
1 stop8h 03m
Delta
Mon 5/1110:40 pm
GEG
- PHL
1 stop7h 47m
Delta
Deal found 4/9![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 4/7. 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.
Wed 5/65:50 am
PHL
- BOI
1 stop7h 05m
Southwest
Wed 5/136:40 am
BOI
- PHL
2 stops9h 10m
Southwest
Deal found 4/7![Southwest logo]()
$364
This American Airlines deal was found by Cheapflights users on 4/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/221:47 pm
PHL
- IDA
2 stops11h 52m
American Airlines
Wed 4/297:48 am
IDA
- PHL
2 stops14h 23m
American Airlines
Deal found 4/7![American Airlines logo]()
$385
This United Airlines deal was found by Cheapflights users on 4/9. 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 4/253:40 pm
PHL
- JAC
1 stop7h 13m
United Airlines
Wed 4/292:35 pm
JAC
- PHL
1 stop7h 09m
United Airlines
Deal found 4/9![United Airlines logo]()
$419
This Expedia deal was found by Cheapflights users on 4/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:16 pm
PHL
- SUN
1 stop16h 58m
Alaska Airlines
Sun 5/3110:56 am
SUN
- PHL
1 stop16h 39m
Alaska Airlines
Deal found 4/9![Alaska Airlines logo]()
$425
This Delta deal was found by Cheapflights users on 4/9. 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 9/34:05 pm
PHL
- GEG
1 stop8h 24m
Delta
Mon 9/75:40 pm
GEG
- PHL
1 stop9h 25m
Delta
Deal found 4/9![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 6/115:37 pm
GEG
- PHL
1 stop9h 08m
Delta
Deal found 4/5![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 4/9. 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 5/97:10 am
PHL
- GEG
1 stop8h 03m
Delta
Tue 5/127:23 pm
GEG
- PHL
2 stops12h 07m
Delta
Deal found 4/9![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 4/9. 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.
Wed 6/33:44 pm
PHL
- GEG
2 stops10h 51m
Delta
Wed 6/1010:48 pm
GEG
- PHL
1 stop7h 46m
Delta
Deal found 4/9![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 4/4. Clicking the “Pick Dates” 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 5/56:54 pm
PHL
- BOI
1 stop7h 03m
Delta
Tue 5/1212:55 pm
BOI
- PHL
2 stops10h 02m
Delta
Deal found 4/4![Delta logo]()
$284
This Alaska Airlines deal was found by Cheapflights users on 4/6. 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.
Tue 4/217:25 am
PHL
- IDA
1 stop10h 54m
Alaska Airlines
Sat 4/256:00 am
IDA
- PHL
1 stop9h 58m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$429
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Sun 5/2410:32 am
PHL
- JAC
2 stops12h 26m
United Airlines
Fri 5/298:00 am
JAC
- PHL
2 stops14h 45m
United Airlines
Deal found 4/9![United Airlines logo]()
$455
This Delta deal was found by Cheapflights users on 4/9. 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 8/225:15 pm
PHL
- BOI
2 stops8h 41m
Delta
Sat 8/291:15 pm
BOI
- PHL
2 stops9h 46m
Delta
Deal found 4/9![Delta logo]()
$290
This United Airlines deal was found by Cheapflights users on 4/8. 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 4/246:17 am
PHL
- SUN
2 stops9h 18m
United Airlines
Tue 4/282:24 pm
SUN
- PHL
1 stop7h 19m
United Airlines
Deal found 4/8![United Airlines logo]()
$476
This Delta deal was found by Cheapflights users on 4/7. 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 4/302:59 pm
PHL
- GEG
1 stop9h 06m
Delta
Thu 5/710:40 pm
GEG
- PHL
1 stop7h 47m
Delta
Deal found 4/7![Delta logo]()
$299
This Delta deal was found by Cheapflights users on 4/6. 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 7/147:08 am
PHL
- BOI
1 stop10h 10m
Delta
Wed 7/226:07 pm
BOI
- PHL
1 stop9h 46m
Delta
Deal found 4/6![Delta logo]()
$299
This United Airlines deal was found by Cheapflights users on 4/6. 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 5/29:55 am
PHL
- IDA
1 stop7h 48m
United Airlines
Tue 5/510:40 am
IDA
- PHL
1 stop6h 57m
United Airlines
Deal found 4/6![United Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 4/7. 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 4/302:59 pm
PHL
- GEG
2 stops11h 35m
Delta
Sat 5/26:00 am
GEG
- PHL
2 stops11h 53m
Delta
Deal found 4/7![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 4/9. 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 5/28:00 am
PHL
- SUN
1 stop7h 38m
United Airlines
Tue 5/52:30 pm
SUN
- PHL
1 stop7h 13m
United Airlines
Deal found 4/9![United Airlines logo]()
$511
This Delta deal was found by Cheapflights users on 4/7. 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 4/305:32 pm
PHL
- GEG
2 stops9h 48m
Delta
Tue 5/57:03 pm
GEG
- PHL
2 stops11h 22m
Delta
Deal found 4/7![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 4/9. 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 9/510:28 am
PHL
- JAC
2 stops12h 37m
United Airlines
Sat 9/128:00 am
JAC
- PHL
2 stops14h 50m
United Airlines
Deal found 4/9![United Airlines logo]()
$529
This Delta deal was found by Cheapflights users on 4/7. 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.
Wed 5/66:05 am
PHL
- GEG
2 stops11h 44m
Delta
Wed 5/137:23 pm
GEG
- PHL
2 stops10h 32m
Delta
Deal found 4/7![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 4/6. 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.
Tue 4/288:00 am
PHL
- SUN
1 stop7h 35m
United Airlines
Fri 5/12:30 pm
SUN
- PHL
1 stop7h 13m
United Airlines
Deal found 4/6![United Airlines logo]()
$531
This Delta deal was found by Cheapflights users on 4/8. 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 7/1412:36 pm
PHL
- BOI
2 stops13h 29m
Delta
Mon 7/2011:53 am
BOI
- PHL
2 stops10h 04m
Delta
Deal found 4/8![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 4/8. 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 8/2810:00 am
PHL
- WYS
1 stop8h 07m
United Airlines
Sat 9/52:02 pm
WYS
- PHL
1 stop7h 35m
United Airlines
Deal found 4/8![United Airlines logo]()
$564
This Delta deal was found by Cheapflights users on 4/9. 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.
Tue 7/217:08 am
PHL
- GEG
1 stop8h 08m
Delta
Tue 7/284:30 pm
GEG
- PHL
1 stop10h 23m
Delta
Deal found 4/9![Delta logo]()
$338
This United Airlines deal was found by Cheapflights users on 4/7. 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 5/2310:00 am
PHL
- JAC
1 stop7h 25m
United Airlines
Thu 5/281:42 pm
JAC
- PHL
2 stops9h 03m
United Airlines
Deal found 4/7![United Airlines logo]()
$572
This Delta deal was found by Cheapflights users on 4/6. 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.
Thu 4/302:59 pm
PHL
- GEG
1 stop9h 06m
Delta
Sun 5/37:38 pm
GEG
- PHL
2 stops11h 48m
Delta
Deal found 4/6![Delta logo]()
$353
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Fri 5/226:10 am
PHL
- SUN
2 stops9h 37m
United Airlines
Sun 5/311:57 pm
SUN
- PHL
2 stops13h 34m
United Airlines
Deal found 4/9![United Airlines logo]()
$574
This Delta deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 7/96:05 am
PHL
- GEG
2 stops10h 16m
Delta
Mon 7/137:08 pm
GEG
- PHL
1 stop8h 05m
Delta
Deal found 4/5![Delta logo]()
$354
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated April 10, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated April 10, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 4/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:41 pm
PHL
- GEG
1 stop17h 08m
Frontier
Sun 4/2611:44 am
GEG
- PHL
1 stop14h 50m
Frontier
Deal found 4/7![Frontier logo]()
$217
This Southwest deal was found by Cheapflights users on 4/6. 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.
Mon 4/275:40 am
PHL
- GEG
2 stops11h 30m
Southwest
Wed 4/295:10 am
GEG
- PHL
2 stops9h 40m
Southwest
Deal found 4/6![Southwest logo]()
$289
This Delta deal was found by Cheapflights users on 4/9. 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 5/46:54 pm
PHL
- GEG
1 stop7h 40m
Delta
Thu 5/144:15 pm
GEG
- PHL
1 stop10h 22m
Delta
Deal found 4/9![Delta logo]()
$279
This Alaska Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/57:22 am
PHL
- BOI
1 stop10h 11m
Alaska Airlines
Tue 5/56:08 pm
BOI
- PHL
1 stop9h 54m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$273
This Alaska Airlines deal was found by Cheapflights users on 4/6. 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.
Tue 5/57:22 am
PHL
- BOI
1 stop10h 11m
Alaska Airlines
Tue 5/126:08 pm
BOI
- PHL
1 stop9h 32m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 4/9. 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.
Tue 5/56:54 pm
PHL
- GEG
1 stop7h 40m
Delta
Sat 5/94:57 pm
GEG
- PHL
2 stops13h 30m
Delta
Deal found 4/9![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 4/8. 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 5/56:54 pm
PHL
- BOI
1 stop7h 03m
Delta
Tue 5/129:16 pm
BOI
- PHL
2 stops11h 14m
Delta
Deal found 4/8![Delta logo]()
$284
This American Airlines deal was found by Cheapflights users on 4/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:30 pm
PHL
- GEG
1 stop8h 40m
American Airlines
Wed 5/131:13 pm
GEG
- PHL
1 stop7h 46m
American Airlines
Deal found 4/7![American Airlines logo]()
$285
This Delta deal was found by Cheapflights users on 4/9. 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 5/73:44 pm
PHL
- GEG
2 stops10h 51m
Delta
Tue 5/127:23 pm
GEG
- PHL
2 stops12h 07m
Delta
Deal found 4/9![Delta logo]()
$290
This Frontier deal was found by Cheapflights users on 4/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Sun 5/171:22 pm
BOI
- PHL
1 stop14h 15m
Frontier
Deal found 4/7![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 4/9. 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.
Sun 5/249:12 pm
PHL
- BOI
2 stops41h 18m
Frontier
Tue 6/21:25 pm
BOI
- PHL
1 stop14h 12m
Frontier
Deal found 4/9![Frontier logo]()
$272
This Mytrip deal was found by Cheapflights users on 4/9. 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 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 4/9![Frontier logo]()
$230
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 10, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated April 10, 2026.
This Booking.com deal was found by Cheapflights users on 4/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Deal found 4/6![Frontier logo]()
$86
This Mytrip deal was found by Cheapflights users on 4/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:41 pm
PHL
- BOI
1 stop16h 27m
Frontier
Deal found 4/6![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/68:35 pm
PHL
- GEG
2 stops26h 54m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$138
This American Airlines deal was found by Cheapflights users on 4/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/68:40 am
PHL
- GEG
1 stop8h 39m
American Airlines
Deal found 4/7![American Airlines logo]()
$140
This American Airlines deal was found by Cheapflights users on 4/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:00 am
PHL
- BOI
1 stop8h 49m
American Airlines
Deal found 4/8![American Airlines logo]()
$140
This American Airlines deal was found by Cheapflights users on 4/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/203:58 pm
PHL
- GEG
1 stop10h 11m
American Airlines
Deal found 4/9![American Airlines logo]()
$141
This Delta deal was found by Cheapflights users on 4/9. 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.
Wed 5/206:12 am
PHL
- GEG
2 stops9h 59m
Delta
Deal found 4/9![Delta logo]()
$145
This Southwest deal was found by Cheapflights users on 4/8. 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.
Sat 5/95:35 am
PHL
- BOI
2 stops10h 35m
Southwest
Deal found 4/8![Southwest logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:35 pm
PHL
- BOI
2 stops19h 48m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$146
This Delta deal was found by Cheapflights users on 4/8. 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 8/127:05 am
PHL
- GEG
1 stop10h 41m
Delta
Deal found 4/8![Delta logo]()
$150
This Delta deal was found by Cheapflights users on 4/7. 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.
Mon 5/112:23 pm
PHL
- BOI
1 stop10h 05m
Delta
Deal found 4/7![Delta logo]()
$150
This Delta deal was found by Cheapflights users on 4/8. 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 4/2911:34 am
PHL
- BOI
2 stops11h 50m
Delta
Deal found 4/8![Delta logo]()
$155
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 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $186 (Frontier) |
One-way from | $86 (Booking.com) |
Popular in | December |
Cheapest in | September |
Average price | $454 |
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 10, 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
Sat 5/9
7:10 am-12:13 pm
1 stop8h 03m
Spokane
Mon 5/11
10:40 pm-9:27 am
1 stop7h 47m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 9/3
4:05 pm-9:29 pm
1 stop8h 24m
Spokane
Mon 9/7
5:40 pm-6:05 am
1 stop9h 25m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 6/3
12:38 pm-11:35 pm
2 stops13h 57m
Spokane
Thu 6/11
5:37 pm-5:45 am
1 stop9h 08m
$284
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 5/9
7:10 am-12:13 pm
1 stop8h 03m
Spokane
Tue 5/12
7:23 pm-10:30 am
2 stops12h 07m
$284
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 6/3
3:44 pm-11:35 pm
2 stops10h 51m
Spokane
Wed 6/10
10:48 pm-9:34 am
1 stop7h 46m
$284
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 5/5
6:54 pm-11:57 pm
1 stop7h 03m
Boise Air Term. Gowen Fld
Tue 5/12
12:55 pm-12:57 am
2 stops10h 02m
$284
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Sat 8/22
5:15 pm-11:56 pm
2 stops8h 41m
Boise Air Term. Gowen Fld
Sat 8/29
1:15 pm-1:01 am
2 stops9h 46m
$290
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 4/30
2:59 pm-9:05 pm
1 stop9h 06m
Spokane
Thu 5/7
10:40 pm-9:27 am
1 stop7h 47m
$299
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 7/14
7:08 am-3:18 pm
1 stop10h 10m
Boise Air Term. Gowen Fld
Wed 7/22
6:07 pm-5:53 am
1 stop9h 46m
$299
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 4/30
2:59 pm-11:34 pm
2 stops11h 35m
Spokane
Sat 5/2
6:00 am-8:53 pm
2 stops11h 53m
$309
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Philadelphia to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Philadelphia with our price prediction graph.
PHL-BOI
PHL-GEG
PHL-JAC
PHL-IDA
PHL-WYS
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Philadelphia to Idaho
PHL-USID
PHL-BOI
PHL-GEG
PHL-JAC
PHL-IDA
What is the cheapest month to book a flight from Philadelphia to Idaho?
Currently, May is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $139). Flying from Philadelphia to Idaho in March is currently the most expensive (average of $343). 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 10, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from Philadelphia to Idaho to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
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
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Complete your trip
Complete your trip to Idaho by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Philadelphia to Idaho by cabin class
Find flights from Philadelphia to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Idaho flights
Browse other Philadelphia and Idaho flight options. Last updated on April 10, 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 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$513 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$491 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$610 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$371 | Average$478 | FlexibilityNo cancel fee | On-time63% |