$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
Apr 26 — May 31
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 March 27, 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 March 27, 2026.
This Booking.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/168:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Tue 5/191:22 pm
BOI
- PHL
1 stop14h 15m
Frontier
Deal found 3/23![Frontier logo]()
$243
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 6/36:45 pm
PHL
- GEG
1 stop7h 50m
Delta
Wed 6/102:23 pm
GEG
- PHL
1 stop6h 36m
Delta
Deal found 3/26![Delta logo]()
$303
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 5/55:30 am
PHL
- BOI
1 stop9h 37m
Delta
Tue 5/122:23 pm
BOI
- PHL
1 stop6h 49m
Delta
Deal found 3/24![Delta logo]()
$305
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/185:35 am
PHL
- GEG
1 stop7h 30m
Southwest
Wed 4/221:45 pm
GEG
- PHL
1 stop7h 10m
Southwest
Deal found 3/26![Southwest logo]()
$330
This American Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 5/27:15 am
PHL
- BOI
1 stop7h 34m
American Airlines
Wed 5/66:26 pm
BOI
- PHL
1 stop10h 34m
American Airlines
Deal found 3/26![American Airlines logo]()
$331
This American Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” 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 6/35:35 pm
PHL
- GEG
1 stop8h 45m
American Airlines
Thu 6/112:08 pm
GEG
- PHL
1 stop7h 23m
American Airlines
Deal found 3/25![American Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 6/1112:35 pm
GEG
- PHL
1 stop8h 24m
Delta
Deal found 3/26![Delta logo]()
$340
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 4/145:32 pm
PHL
- GEG
2 stops9h 48m
Delta
Sat 4/181:07 pm
GEG
- PHL
2 stops13h 52m
Delta
Deal found 3/24![Delta logo]()
$341
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:18 pm
PHL
- GEG
2 stops9h 17m
Delta
Mon 5/185:37 pm
GEG
- PHL
2 stops12h 18m
Delta
Deal found 3/23![Delta logo]()
$345
This Alaska Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 10/276:45 am
PHL
- IDA
1 stop10h 44m
Alaska Airlines
Sat 10/316:15 am
IDA
- PHL
1 stop8h 41m
Alaska Airlines
Deal found 3/26![Alaska Airlines logo]()
$349
This Alaska Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:58 pm
PHL
- GEG
1 stop7h 57m
Alaska Airlines
Wed 4/297:41 pm
GEG
- PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/23![Alaska Airlines logo]()
$352
This Expedia deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” 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.
Sun 5/247:00 am
PHL
- GEG
1 stop9h 04m
Multiple Airlines
Fri 6/512:33 pm
GEG
- PHL
1 stop14h 04m
Multiple Airlines
Deal found 3/25![Multiple Airlines logo]()
$354
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 March 27, 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 March 27, 2026.
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 6/35:45 am
PHL
- GEG
2 stops9h 16m
Delta
Wed 6/104:30 pm
GEG
- PHL
2 stops10h 38m
Delta
Deal found 3/24![Delta logo]()
$313
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/185:35 am
PHL
- GEG
1 stop7h 30m
Southwest
Wed 4/221:45 pm
GEG
- PHL
1 stop7h 10m
Southwest
Deal found 3/26![Southwest logo]()
$330
This Alaska Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:58 pm
PHL
- GEG
1 stop7h 57m
Alaska Airlines
Wed 4/297:41 pm
GEG
- PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$357
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/283:40 pm
PHL
- BOI
1 stop7h 42m
United Airlines
Sat 5/22:33 pm
BOI
- PHL
1 stop7h 10m
United Airlines
Deal found 3/22![United Airlines logo]()
$357
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” 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 5/147:01 pm
PHL
- GEG
1 stop7h 05m
Delta
Tue 5/1910:40 pm
GEG
- PHL
1 stop9h 22m
Delta
Deal found 3/25![Delta logo]()
$335
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:00 pm
PHL
- GEG
1 stop7h 15m
Southwest
Sat 4/2510:45 am
GEG
- PHL
1 stop9h 15m
Southwest
Deal found 3/22![Southwest logo]()
$357
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 5/196:35 am
PHL
- GEG
2 stops12h 38m
Delta
Sat 5/234:15 pm
GEG
- PHL
1 stop10h 22m
Delta
Deal found 3/24![Delta logo]()
$340
This United Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 9/53:55 pm
PHL
- IDA
1 stop7h 08m
United Airlines
Fri 9/112:30 pm
IDA
- PHL
1 stop7h 07m
United Airlines
Deal found 3/26![United Airlines logo]()
$376
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:50 am
PHL
- BOI
1 stop7h 05m
Southwest
Tue 4/286:40 am
BOI
- PHL
2 stops9h 10m
Southwest
Deal found 3/22![Southwest logo]()
$362
This Alaska Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:22 am
PHL
- BOI
1 stop10h 11m
Alaska Airlines
Sat 5/27:20 pm
BOI
- PHL
1 stop8h 42m
Alaska Airlines
Deal found 3/23![Alaska Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1812:25 pm
PHL
- GEG
2 stops13h 08m
Delta
Sat 4/253:33 pm
GEG
- PHL
2 stops11h 26m
Delta
Deal found 3/22![Delta logo]()
$368
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 5/27:45 am
PHL
- BOI
2 stops10h 30m
Southwest
Wed 5/66:00 am
BOI
- PHL
2 stops9h 50m
Southwest
Deal found 3/26![Southwest logo]()
$377
This United Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/2910:00 am
PHL
- BOI
2 stops14h 15m
United Airlines
Sat 5/22:33 pm
BOI
- PHL
1 stop7h 10m
United Airlines
Deal found 3/26![United Airlines logo]()
$446
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/282:23 pm
PHL
- GEG
1 stop9h 57m
Delta
Mon 6/15:39 pm
GEG
- PHL
2 stops9h 31m
Delta
Deal found 3/23![Delta logo]()
$372
This Alaska Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:15 pm
PHL
- IDA
1 stop23h 12m
Alaska Airlines
Fri 8/284:00 pm
IDA
- PHL
1 stop22h 06m
Alaska Airlines
Deal found 3/23![Alaska Airlines logo]()
$489
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/68:00 am
PHL
- SUN
1 stop7h 35m
United Airlines
Fri 4/102:24 pm
SUN
- PHL
1 stop7h 19m
United Airlines
Deal found 3/22![United Airlines logo]()
$461
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:15 am
PHL
- IDA
1 stop7h 11m
Delta
Mon 4/276:58 pm
IDA
- PHL
1 stop9h 01m
Delta
Deal found 3/23![Delta logo]()
$384
This Southwest deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:00 am
PHL
- BOI
1 stop6h 45m
Southwest
Thu 6/1112:05 pm
BOI
- PHL
2 stops10h 15m
Southwest
Deal found 3/24![Southwest logo]()
$429
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:15 am
PHL
- IDA
1 stop7h 11m
Delta
Tue 4/286:58 pm
IDA
- PHL
2 stops12h 27m
Delta
Deal found 3/23![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 4/116:17 am
PHL
- SUN
2 stops9h 18m
United Airlines
Wed 4/152:24 pm
SUN
- PHL
1 stop7h 19m
United Airlines
Deal found 3/27![United Airlines logo]()
$476
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/176:00 am
PHL
- GEG
2 stops9h 27m
Delta
Mon 4/206:59 pm
GEG
- PHL
2 stops11h 26m
Delta
Deal found 3/26![Delta logo]()
$408
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/218:00 am
PHL
- SUN
1 stop7h 35m
United Airlines
Wed 4/222:24 pm
SUN
- PHL
1 stop7h 19m
United Airlines
Deal found 3/23![United Airlines logo]()
$511
This Alaska Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:56 pm
PHL
- SUN
1 stop17h 42m
Alaska Airlines
Mon 9/710:20 am
SUN
- PHL
1 stop17h 07m
Alaska Airlines
Deal found 3/23![Alaska Airlines logo]()
$658
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 5/27:15 am
PHL
- JAC
1 stop6h 49m
Delta
Wed 5/67:20 am
JAC
- PHL
1 stop8h 22m
Delta
Deal found 3/24![Delta logo]()
$419
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:00 am
PHL
- WYS
1 stop8h 07m
United Airlines
Wed 9/22:02 pm
WYS
- PHL
2 stops8h 48m
United Airlines
Deal found 3/22![United Airlines logo]()
$533
This Alaska Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:43 pm
PHL
- JAC
2 stops23h 24m
Alaska Airlines
Tue 8/1112:00 pm
JAC
- PHL
2 stops25h 23m
Alaska Airlines
Deal found 3/23![Alaska Airlines logo]()
$696
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 8/197:00 am
PHL
- IDA
1 stop9h 27m
Delta
Tue 8/256:50 pm
IDA
- PHL
1 stop8h 53m
Delta
Deal found 3/27![Delta logo]()
$442
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:00 am
PHL
- SUN
1 stop7h 35m
United Airlines
Sun 4/262:24 pm
SUN
- PHL
2 stops8h 35m
United Airlines
Deal found 3/22![United Airlines logo]()
$580
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 8/2211:45 am
PHL
- IDA
2 stops8h 29m
Delta
Fri 8/286:50 pm
IDA
- PHL
1 stop8h 53m
Delta
Deal found 3/24![Delta logo]()
$449
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:15 am
PHL
- IDA
1 stop7h 11m
Delta
Mon 4/276:58 pm
IDA
- PHL
1 stop9h 01m
Delta
Deal found 3/23![Delta logo]()
$471
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated March 27, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated March 27, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 4/145:32 pm
PHL
- GEG
2 stops9h 48m
Delta
Sat 4/181:07 pm
GEG
- PHL
2 stops13h 52m
Delta
Deal found 3/24![Delta logo]()
$341
This American Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:21 pm
PHL
- BOI
1 stop9h 33m
American Airlines
Mon 4/206:26 pm
BOI
- PHL
1 stop9h 12m
American Airlines
Deal found 3/26![American Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/167:03 am
PHL
- BOI
1 stop8h 04m
Delta
Mon 4/2011:35 pm
BOI
- PHL
2 stops10h 13m
Delta
Deal found 3/26![Delta logo]()
$374
This American Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/173:58 pm
PHL
- GEG
1 stop10h 12m
American Airlines
Tue 4/211:22 pm
GEG
- PHL
1 stop7h 37m
American Airlines
Deal found 3/24![American Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 4/176:54 pm
PHL
- GEG
1 stop7h 40m
Delta
Tue 4/217:38 pm
GEG
- PHL
2 stops10h 17m
Delta
Deal found 3/24![Delta logo]()
$371
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/185:35 am
PHL
- GEG
1 stop7h 30m
Southwest
Wed 4/221:45 pm
GEG
- PHL
1 stop7h 10m
Southwest
Deal found 3/26![Southwest logo]()
$330
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:00 pm
PHL
- GEG
1 stop7h 15m
Southwest
Sat 4/2510:45 am
GEG
- PHL
1 stop9h 15m
Southwest
Deal found 3/22![Southwest logo]()
$357
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1812:25 pm
PHL
- GEG
2 stops13h 08m
Delta
Sat 4/252:10 pm
GEG
- PHL
1 stop6h 48m
Delta
Deal found 3/22![Delta logo]()
$362
This American Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:15 am
PHL
- BOI
1 stop7h 34m
American Airlines
Tue 4/281:53 pm
BOI
- PHL
1 stop8h 18m
American Airlines
Deal found 3/22![American Airlines logo]()
$357
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:50 am
PHL
- BOI
1 stop7h 05m
Southwest
Tue 4/286:40 am
BOI
- PHL
2 stops9h 10m
Southwest
Deal found 3/22![Southwest logo]()
$362
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:15 am
PHL
- IDA
1 stop7h 11m
Delta
Tue 4/286:58 pm
IDA
- PHL
1 stop9h 01m
Delta
Deal found 3/23![Delta logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:58 pm
PHL
- GEG
1 stop7h 57m
Alaska Airlines
Wed 4/297:41 pm
GEG
- PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/23![Alaska Airlines logo]()
$352
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 March 27, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated March 27, 2026.
This Mytrip deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 3/23![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” 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
- BOI
1 stop17h 52m
Frontier
Deal found 3/25![Frontier logo]()
$124
This American Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:30 pm
PHL
- GEG
1 stop8h 40m
American Airlines
Deal found 3/23![American Airlines logo]()
$152
This Southwest deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:00 pm
PHL
- GEG
2 stops11h 55m
Southwest
Deal found 3/23![Southwest logo]()
$157
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:00 pm
PHL
- GEG
2 stops11h 55m
Southwest
Deal found 3/22![Southwest logo]()
$158
This Southwest deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:20 am
PHL
- BOI
2 stops11h 05m
Southwest
Deal found 3/23![Southwest logo]()
$159
This American Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/205:30 pm
PHL
- GEG
1 stop8h 39m
American Airlines
Deal found 3/23![American Airlines logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 3/24![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” 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 4/158:41 pm
PHL
- TWF
3 stops41h 19m
Multiple Airlines
Deal found 3/25![Multiple Airlines logo]()
$175
This United Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” 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 5/99:55 am
PHL
- GEG
1 stop8h 23m
United Airlines
Deal found 3/24![United Airlines logo]()
$179
This American Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/73:58 pm
PHL
- GEG
1 stop10h 11m
American Airlines
Deal found 3/24![American Airlines logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/155:45 am
PHL
- BOI
3 stops31h 23m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$192
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 March 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $207 (Booking.com) |
One-way from | $86 (Mytrip) |
Popular in | December |
Cheapest in | September |
Average price | $408 |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 27, 2026.
Use the filters below to find and compare flights from Philadelphia to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 6/3
5:45 am-12:01 pm
2 stops9h 16m
Spokane
Wed 6/10
4:30 pm-6:08 am
2 stops10h 38m
$313
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 4/18
5:35 am-10:05 am
1 stop7h 30m
Spokane
Wed 4/22
1:45 pm-11:55 pm
1 stop7h 10m
$330
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 5/14
7:01 pm-11:06 pm
1 stop7h 05m
Spokane
Tue 5/19
10:40 pm-11:02 am
1 stop9h 22m
$335
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 5/19
6:35 am-4:13 pm
2 stops12h 38m
Spokane
Sat 5/23
4:15 pm-5:37 am
1 stop10h 22m
$340
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 4/28
6:58 pm-11:55 pm
1 stop7h 57m
Spokane
Wed 4/29
7:41 pm-6:02 am
1 stop7h 21m
$357
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 4/28
3:40 pm-9:22 pm
1 stop7h 42m
Boise Air Term. Gowen Fld
Sat 5/2
2:33 pm-11:43 pm
1 stop7h 10m
$357
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 4/18
5:00 pm-9:15 pm
1 stop7h 15m
Spokane
Sat 4/25
10:45 am-11:00 pm
1 stop9h 15m
$357
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 4/21
5:50 am-10:55 am
1 stop7h 05m
Boise Air Term. Gowen Fld
Tue 4/28
6:40 am-5:50 pm
2 stops9h 10m
$362
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 4/18
12:25 pm-10:33 pm
2 stops13h 08m
Spokane
Sat 4/25
3:33 pm-5:59 am
2 stops11h 26m
$368
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Thu 5/28
2:23 pm-9:20 pm
1 stop9h 57m
Spokane
Mon 6/1
5:39 pm-6:10 am
2 stops9h 31m
$372
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-IDA
PHL-SUN
PHL-JAC
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-IDA
PHL-SUN
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 $136). Flying from Philadelphia to Idaho in February is currently the most expensive (average of $298). 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 March 27, 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.
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
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.
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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 March 27, 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 March 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$515 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$489 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$639 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$371 | Average$481 | FlexibilityNo cancel fee | On-time63% |