$140+ 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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Jul 24 — Jul 311
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Philadelphia to Idaho with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Philadelphia to Idaho
Cheapest
Best
Last-minute
One-way
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 24, 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 24, 2026.
This Booking.com deal was found by Cheapflights users on 6/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/138:37 pm
PHL
- BOI
1 stop17h 52m
Frontier
Thu 7/161:24 pm
BOI
- PHL
1 stop20h 25m
Frontier
Deal found 6/22![Frontier logo]()
$252
This Booking.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2012:54 pm
PHL
- BOI
1 stop25h 35m
Frontier
Thu 7/231:24 pm
BOI
- PHL
1 stop20h 25m
Frontier
Deal found 6/20![Frontier logo]()
$253
This Booking.com deal was found by Cheapflights users on 6/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/298:37 pm
PHL
- BOI
1 stop17h 53m
Multiple Airlines
Fri 7/36:13 pm
BOI
- PHL
1 stop10h 00m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$298
This Travelocity deal was found by Cheapflights users on 6/22. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:00 am
PHL
- BOI
1 stop10h 23m
Alaska Airlines
Tue 10/136:01 pm
BOI
- PHL
1 stop9h 39m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$300
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Sat 8/225:00 am
PHL
- BOI
1 stop8h 16m
American Airlines
Sat 8/292:58 pm
BOI
- PHL
1 stop7h 01m
American Airlines
Deal found 6/24![American Airlines logo]()
$301
This American Airlines deal was found by Cheapflights users on 6/22. 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.
Fri 8/71:40 pm
PHL
- BOI
1 stop11h 00m
American Airlines
Mon 8/103:19 pm
BOI
- PHL
1 stop6h 40m
American Airlines
Deal found 6/22![American Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:40 am
PHL
- BOI
1 stop7h 18m
Delta
Mon 7/67:53 pm
BOI
- PHL
1 stop7h 37m
Delta
Deal found 6/20![Delta logo]()
$307
This Delta deal was found by Cheapflights users on 6/22. 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.
Thu 9/32:31 pm
PHL
- GEG
1 stop9h 59m
Delta
Tue 9/85:49 pm
GEG
- PHL
1 stop9h 01m
Delta
Deal found 6/22![Delta logo]()
$311
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Tue 10/136:10 am
PHL
- JAC
1 stop7h 11m
United Airlines
Tue 10/202:48 pm
JAC
- PHL
1 stop6h 41m
United Airlines
Deal found 6/24![United Airlines logo]()
$311
This Southwest deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/153:05 pm
PHL
- GEG
2 stops10h 50m
Southwest
Tue 9/221:55 pm
GEG
- PHL
1 stop6h 55m
Southwest
Deal found 6/20![Southwest logo]()
$316
This Delta deal was found by Cheapflights users on 6/23. 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 8/207:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Mon 8/315:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 6/23![Delta logo]()
$317
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:05 am
PHL
- GEG
1 stop8h 03m
Delta
Sat 8/295:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 6/23![Delta logo]()
$323
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 24, 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 24, 2026.
This Delta deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/105:40 am
PHL
- BOI
1 stop7h 17m
Delta
Tue 7/146:07 pm
BOI
- PHL
1 stop9h 22m
Delta
Deal found 6/19![Delta logo]()
$304
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:10 pm
PHL
- BOI
1 stop8h 00m
Southwest
Wed 8/196:00 am
BOI
- PHL
2 stops10h 00m
Southwest
Deal found 6/21![Southwest logo]()
$335
This United Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:05 am
PHL
- WYS
1 stop8h 01m
United Airlines
Thu 9/31:55 pm
WYS
- PHL
1 stop7h 49m
United Airlines
Deal found 6/21![United Airlines logo]()
$381
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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 6/305:46 pm
PHL
- GEG
1 stop8h 13m
Alaska Airlines
Fri 7/311:40 am
GEG
- PHL
1 stop15h 33m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$384
This Kiwi.com deal was found by Cheapflights users on 6/23. 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.
Sun 8/211:06 am
PHL
- IDA
1 stop30h 54m
Multiple Airlines
Fri 8/710:54 pm
IDA
- PHL
1 stop29h 06m
Multiple Airlines
Deal found 6/23![Multiple Airlines logo]()
$470
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:40 am
PHL
- BOI
1 stop7h 18m
Delta
Mon 7/67:53 pm
BOI
- PHL
1 stop7h 37m
Delta
Deal found 6/20![Delta logo]()
$307
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:05 am
PHL
- GEG
1 stop8h 03m
Delta
Sat 8/295:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Deal found 6/23![Delta logo]()
$323
This Southwest deal was found by Cheapflights users on 6/24. 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.
Mon 8/106:05 pm
PHL
- GEG
1 stop7h 35m
Southwest
Wed 8/126:15 am
GEG
- PHL
2 stops11h 20m
Southwest
Deal found 6/24![Southwest logo]()
$367
This United Airlines deal was found by Cheapflights users on 6/22. 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 7/86:00 am
PHL
- BOI
1 stop7h 32m
United Airlines
Sat 7/117:05 pm
BOI
- PHL
1 stop10h 45m
United Airlines
Deal found 6/22![United Airlines logo]()
$393
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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 9/17:02 am
PHL
- GEG
1 stop8h 29m
Alaska Airlines
Wed 9/27:03 am
GEG
- PHL
1 stop7h 53m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$410
This Southwest deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:00 am
PHL
- BOI
1 stop6h 55m
Southwest
Thu 8/132:55 pm
BOI
- PHL
1 stop6h 50m
Southwest
Deal found 6/20![Southwest logo]()
$379
This Delta deal was found by Cheapflights users on 6/22. 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.
Wed 7/84:08 pm
PHL
- BOI
1 stop7h 49m
Delta
Mon 7/136:07 pm
BOI
- PHL
1 stop9h 22m
Delta
Deal found 6/22![Delta logo]()
$350
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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 9/17:02 am
PHL
- BOI
1 stop10h 29m
Alaska Airlines
Wed 9/28:03 am
BOI
- PHL
1 stop7h 53m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1411:38 am
PHL
- BOI
2 stops12h 27m
United Airlines
Wed 7/227:05 pm
BOI
- PHL
2 stops13h 25m
United Airlines
Deal found 6/19![United Airlines logo]()
$421
This Southwest deal was found by Cheapflights users on 6/23. 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.
Fri 9/184:05 pm
PHL
- BOI
2 stops9h 50m
Southwest
Fri 9/252:55 pm
BOI
- PHL
1 stop6h 50m
Southwest
Deal found 6/23![Southwest logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/304:26 pm
PHL
- GEG
1 stop9h 10m
Alaska Airlines
Sun 7/55:00 am
GEG
- PHL
1 stop7h 23m
Alaska Airlines
Deal found 6/20![Alaska Airlines logo]()
$424
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:05 pm
PHL
- GEG
2 stops10h 20m
Southwest
Tue 9/81:55 pm
GEG
- PHL
1 stop6h 55m
Southwest
Deal found 6/21![Southwest logo]()
$388
This Delta deal was found by Cheapflights users on 6/22. 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.
Thu 7/165:40 am
PHL
- GEG
1 stop8h 59m
Delta
Mon 7/204:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Deal found 6/22![Delta logo]()
$405
This United Airlines deal was found by Cheapflights users on 6/22. 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 10/276:25 am
PHL
- IDA
2 stops9h 06m
United Airlines
Sat 10/312:32 pm
IDA
- PHL
1 stop7h 14m
United Airlines
Deal found 6/22![United Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 6/23. 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.
Mon 7/136:55 pm
PHL
- BOI
1 stop7h 10m
Delta
Thu 7/1611:10 pm
BOI
- PHL
1 stop8h 21m
Delta
Deal found 6/23![Delta logo]()
$409
This Southwest deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/144:35 pm
PHL
- BOI
2 stops9h 55m
Southwest
Wed 7/2210:40 am
BOI
- PHL
1 stop12h 25m
Southwest
Deal found 6/19![Southwest logo]()
$410
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:46 am
PHL
- IDA
2 stops10h 49m
Delta
Fri 8/287:00 pm
IDA
- PHL
1 stop9h 05m
Delta
Deal found 6/20![Delta logo]()
$415
This Travelocity deal was found by Cheapflights users on 6/24. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:59 pm
PHL
- SUN
1 stop16h 47m
Alaska Airlines
Sat 9/2610:28 am
SUN
- PHL
2 stops27h 17m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$516
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/308:00 am
PHL
- JAC
1 stop9h 25m
United Airlines
Wed 7/84:23 pm
JAC
- PHL
3 stops16h 07m
United Airlines
Deal found 6/19![United Airlines logo]()
$531
This Southwest deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/43:00 pm
PHL
- GEG
2 stops10h 55m
Southwest
Tue 8/111:55 pm
GEG
- PHL
1 stop6h 55m
Southwest
Deal found 6/20![Southwest logo]()
$459
This Alaska Airlines deal was found by Cheapflights users on 6/22. 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 10/64:06 pm
PHL
- SUN
2 stops21h 05m
Alaska Airlines
Tue 10/1311:53 am
SUN
- PHL
1 stop15h 47m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$536
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:05 am
PHL
- WYS
1 stop8h 01m
United Airlines
Mon 8/311:55 pm
WYS
- PHL
2 stops9h 04m
United Airlines
Deal found 6/23![United Airlines logo]()
$563
This Delta deal was found by Cheapflights users on 6/23. 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 8/2611:39 am
PHL
- JAC
2 stops9h 16m
Delta
Wed 9/27:40 am
JAC
- PHL
1 stop8h 07m
Delta
Deal found 6/23![Delta logo]()
$472
This Southwest deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 6/19![Southwest logo]()
$487
This Alaska Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/134:48 pm
PHL
- IDA
1 stop22h 36m
Alaska Airlines
Fri 9/253:57 pm
IDA
- PHL
2 stops35h 43m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$551
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated June 24, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated June 24, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 6/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/298:37 pm
PHL
- BOI
1 stop17h 53m
Multiple Airlines
Fri 7/36:13 pm
BOI
- PHL
1 stop10h 00m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$298
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:40 am
PHL
- BOI
1 stop7h 18m
Delta
Mon 7/67:53 pm
BOI
- PHL
1 stop7h 37m
Delta
Deal found 6/20![Delta logo]()
$307
This Gotogate deal was found by Cheapflights users on 6/22. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:46 pm
PHL
- BOI
1 stop8h 02m
Multiple Airlines
Sun 7/51:24 pm
BOI
- PHL
1 stop20h 25m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$332
This Booking.com deal was found by Cheapflights users on 6/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/138:37 pm
PHL
- BOI
1 stop17h 52m
Frontier
Thu 7/161:24 pm
BOI
- PHL
1 stop20h 25m
Frontier
Deal found 6/22![Frontier logo]()
$252
This United Airlines deal was found by Cheapflights users on 6/23. 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 7/146:00 am
PHL
- BOI
1 stop7h 32m
United Airlines
Thu 7/162:00 pm
BOI
- PHL
1 stop9h 23m
United Airlines
Deal found 6/23![United Airlines logo]()
$301
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Wed 7/158:15 am
PHL
- BOI
1 stop8h 31m
American Airlines
Mon 7/203:10 pm
BOI
- PHL
1 stop7h 49m
American Airlines
Deal found 6/24![American Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:05 am
PHL
- GEG
1 stop8h 06m
Delta
Tue 7/2810:48 pm
GEG
- PHL
1 stop7h 43m
Delta
Deal found 6/20![Delta logo]()
$335
This Booking.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2012:54 pm
PHL
- BOI
1 stop25h 35m
Frontier
Thu 7/231:24 pm
BOI
- PHL
1 stop20h 25m
Frontier
Deal found 6/20![Frontier logo]()
$253
This Delta deal was found by Cheapflights users on 6/23. 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.
Mon 7/207:05 am
PHL
- GEG
1 stop8h 06m
Delta
Tue 7/284:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Deal found 6/23![Delta logo]()
$311
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Tue 7/214:17 pm
PHL
- GEG
1 stop9h 49m
American Airlines
Tue 7/282:29 pm
GEG
- PHL
1 stop7h 30m
American Airlines
Deal found 6/24![American Airlines logo]()
$340
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:55 pm
PHL
- BOI
1 stop7h 10m
Delta
Tue 7/287:28 pm
BOI
- PHL
1 stop8h 01m
Delta
Deal found 6/22![Delta logo]()
$304
This Delta deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:55 pm
PHL
- GEG
1 stop8h 00m
Delta
Tue 7/284:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Deal found 6/19![Delta logo]()
$333
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 24, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated June 24, 2026.
This Trip.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/68:37 pm
PHL
- BOI
1 stop17h 52m
Frontier
Deal found 6/20![Frontier logo]()
$140
This United Airlines deal was found by Cheapflights users on 6/23. 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 7/146:00 am
PHL
- BOI
1 stop7h 32m
United Airlines
Deal found 6/23![United Airlines logo]()
$151
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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 6/304:26 pm
PHL
- BOI
1 stop9h 38m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$154
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:55 pm
PHL
- GEG
1 stop8h 00m
Delta
Deal found 6/20![Delta logo]()
$156
This Delta deal was found by Cheapflights users on 6/24. 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 8/76:55 pm
PHL
- GEG
1 stop7h 14m
Delta
Deal found 6/24![Delta logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/136:10 pm
PHL
- IDA
2 stops19h 24m
Allegiant Air
Deal found 6/20![Allegiant Air logo]()
$179
This United Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/610:05 am
PHL
- GEG
1 stop8h 01m
United Airlines
Deal found 6/21![United Airlines logo]()
$180
This Southwest deal was found by Cheapflights users on 6/22. 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 7/185:00 am
PHL
- BOI
1 stop6h 45m
Southwest
Deal found 6/22![Southwest logo]()
$180
This Delta deal was found by Cheapflights users on 6/23. 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 7/26:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 6/23![Delta logo]()
$190
This American Airlines deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:00 am
PHL
- JAC
1 stop10h 19m
American Airlines
Deal found 6/20![American Airlines logo]()
$190
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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 8/115:46 pm
PHL
- GEG
1 stop8h 13m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$194
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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 6/305:46 pm
PHL
- GEG
1 stop8h 13m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$195
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 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $252 (Booking.com) |
One-way from | $140 (Trip.com) |
Popular in | June |
Cheapest in | September |
Average price | $601 |
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 24, 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
Fri 7/10
5:40 am-10:57 am
1 stop7h 17m
Boise Air Term. Gowen Fld
Tue 7/14
6:07 pm-5:29 am
1 stop9h 22m
$304
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Fri 7/3
5:40 am-10:58 am
1 stop7h 18m
Boise Air Term. Gowen Fld
Mon 7/6
7:53 pm-5:30 am
1 stop7h 37m
$307
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Sat 8/22
7:05 am-12:08 pm
1 stop8h 03m
Spokane
Sat 8/29
5:40 pm-5:50 am
1 stop9h 10m
$323
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Wed 8/12
5:10 pm-11:10 pm
1 stop8h 00m
Boise Air Term. Gowen Fld
Wed 8/19
6:00 am-6:00 pm
2 stops10h 00m
$335
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Wed 7/8
4:08 pm-9:57 pm
1 stop7h 49m
Boise Air Term. Gowen Fld
Mon 7/13
6:07 pm-5:29 am
1 stop9h 22m
$350
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Mon 8/10
6:05 pm-10:40 pm
1 stop7h 35m
Spokane
Wed 8/12
6:15 am-8:35 pm
2 stops11h 20m
$367
Quickest round-trip
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 8/11
6:00 am-10:55 am
1 stop6h 55m
Boise Air Term. Gowen Fld
Thu 8/13
2:55 pm-11:45 pm
1 stop6h 50m
$379
PhiladelphiaWest Yellowstone
PHL - WYS
PHLWYS
Philadelphia
Sat 8/29
10:05 am-4:06 pm
1 stop8h 01m
West Yellowstone
Thu 9/3
1:55 pm-11:44 pm
1 stop7h 49m
$381
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 6/30
5:46 pm-10:59 pm
1 stop8h 13m
Spokane
Fri 7/3
11:40 am-6:13 am
1 stop15h 33m
$384
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Fri 9/18
4:05 pm-11:55 pm
2 stops9h 50m
Boise Air Term. Gowen Fld
Fri 9/25
2:55 pm-11:45 pm
1 stop6h 50m
$384
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-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-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 $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.
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 7 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 24, 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
Entertainment
7.5
Overall
7.9
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Entertainment
7.5
Overall
7.9
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Entertainment
7.5
Overall
7.9
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Entertainment
7.5
Overall
7.9
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Entertainment
7.5
Overall
7.9
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
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 24, 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 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$493 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$509 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$336 | Average$605 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$350 | Average$556 | FlexibilityNo cancel fee | On-time63% |