$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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
May 29 — Jun 51
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 April 29, 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 29, 2026.
This Delta deal was found by Cheapflights users on 4/26. 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.
Tue 5/265:17 am
PHL
- JAC
2 stops13h 42m
Delta
Tue 6/27:00 am
JAC
- PHL
1 stop5h 49m
Delta
Deal found 4/26![Delta logo]()
$242
This Trip.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/138:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Sun 5/171:22 pm
BOI
- PHL
1 stop14h 15m
Frontier
Deal found 4/28![Frontier logo]()
$248
This Booking.com deal was found by Cheapflights users on 4/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2012:42 pm
PHL
- BOI
1 stop25h 48m
Frontier
Sun 6/281:25 pm
BOI
- PHL
1 stop14h 13m
Frontier
Deal found 4/26![Frontier logo]()
$263
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 stop8h 13m
Delta
Wed 6/107:00 am
GEG
- PHL
1 stop7h 35m
Delta
Deal found 4/28![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 4/26. 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.
Sat 8/227:05 am
PHL
- BOI
1 stop9h 17m
Delta
Sat 8/293:25 pm
BOI
- PHL
1 stop6h 15m
Delta
Deal found 4/26![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 4/25. 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 6/312:51 pm
PHL
- GEG
1 stop10h 52m
American Airlines
Wed 6/1012:51 pm
GEG
- PHL
1 stop8h 45m
American Airlines
Deal found 4/25![American Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 11m
Delta
Thu 6/115:30 am
GEG
- PHL
1 stop9h 05m
Delta
Deal found 4/28![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 4/24. 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 5/265:17 am
PHL
- BOI
1 stop9h 26m
Delta
Thu 5/286:00 am
BOI
- PHL
2 stops14h 12m
Delta
Deal found 4/24![Delta logo]()
$284
This American Airlines deal was found by Cheapflights users on 4/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:00 am
PHL
- BOI
1 stop7h 29m
American Airlines
Thu 5/283:11 pm
BOI
- PHL
1 stop7h 20m
American Airlines
Deal found 4/27![American Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 4/25. 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.
Mon 6/225:40 am
PHL
- GEG
1 stop9h 00m
Delta
Sat 6/2711:19 am
GEG
- PHL
1 stop9h 43m
Delta
Deal found 4/25![Delta logo]()
$299
This Delta deal was found by Cheapflights users on 4/26. 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.
Mon 6/225:40 am
PHL
- BOI
1 stop7h 18m
Delta
Mon 6/296:43 am
BOI
- PHL
1 stop8h 52m
Delta
Deal found 4/26![Delta logo]()
$299
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/277:00 am
PHL
- GEG
1 stop10h 39m
American Airlines
Wed 6/32:14 pm
GEG
- PHL
1 stop7h 24m
American Airlines
Deal found 4/29![American Airlines logo]()
$301
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 29, 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 29, 2026.
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 7/222:32 pm
PHL
- GEG
1 stop10h 01m
Delta
Mon 7/277:00 am
GEG
- PHL
1 stop8h 04m
Delta
Deal found 4/28![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 4/25. 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 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
Mon 8/177:30 am
BOI
- PHL
2 stops11h 35m
Southwest
Deal found 4/25![Southwest logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:00 am
PHL
- BOI
1 stop10h 31m
Alaska Airlines
Wed 9/25:49 pm
BOI
- PHL
1 stop9h 51m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 7/34:14 pm
PHL
- SUN
1 stop7h 12m
United Airlines
Tue 7/78:15 am
SUN
- PHL
2 stops13h 29m
United Airlines
Deal found 4/28![United Airlines logo]()
$461
This Delta deal was found by Cheapflights users on 4/24. 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 8/195:30 am
PHL
- GEG
1 stop8h 54m
Delta
Wed 9/27:21 pm
GEG
- PHL
1 stop7h 44m
Delta
Deal found 4/24![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 4/24. 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 7/247:00 am
PHL
- JAC
1 stop11h 07m
American Airlines
Wed 7/2912:54 pm
JAC
- PHL
2 stops9h 38m
American Airlines
Deal found 4/24![American Airlines logo]()
$577
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:40 am
PHL
- GEG
1 stop8h 59m
Delta
Thu 8/137:21 pm
GEG
- PHL
1 stop7h 44m
Delta
Deal found 4/28![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 4/24. 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 6/245:12 pm
PHL
- BOI
1 stop7h 23m
Delta
Tue 6/302:50 pm
BOI
- PHL
1 stop7h 09m
Delta
Deal found 4/24![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 4/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:45 pm
PHL
- BOI
2 stops10h 25m
Southwest
Tue 7/74:05 pm
BOI
- PHL
1 stop6h 55m
Southwest
Deal found 4/27![Southwest logo]()
$344
This Delta deal was found by Cheapflights users on 4/24. 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 6/27:01 pm
PHL
- GEG
1 stop7h 05m
Delta
Tue 6/97:08 pm
GEG
- PHL
2 stops10h 36m
Delta
Deal found 4/24![Delta logo]()
$284
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
PHL
- SUN
1 stop29h 14m
Alaska Airlines
Thu 6/410:56 am
SUN
- PHL
1 stop16h 39m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$401
This Delta deal was found by Cheapflights users on 4/25. 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.
Tue 7/215:28 pm
PHL
- GEG
2 stops9h 27m
Delta
Tue 7/285:37 pm
GEG
- PHL
1 stop8h 52m
Delta
Deal found 4/25![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 4/26. 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.
Mon 6/224:10 pm
PHL
- BOI
2 stops9h 59m
Delta
Mon 6/296:43 am
BOI
- PHL
1 stop8h 52m
Delta
Deal found 4/26![Delta logo]()
$284
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:32 am
PHL
- SUN
2 stops14h 24m
United Airlines
Thu 6/42:38 pm
SUN
- PHL
1 stop6h 52m
United Airlines
Deal found 4/29![United Airlines logo]()
$468
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:44 pm
PHL
- IDA
1 stop22h 22m
Alaska Airlines
Fri 8/281:45 pm
IDA
- PHL
1 stop13h 55m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$449
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/195:17 am
PHL
- GEG
2 stops10h 54m
Delta
Sat 5/234:59 pm
GEG
- PHL
2 stops13h 24m
Delta
Deal found 4/28![Delta logo]()
$290
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/276:00 am
PHL
- JAC
2 stops13h 54m
United Airlines
Wed 6/38:00 am
JAC
- PHL
2 stops14h 45m
United Airlines
Deal found 4/29![United Airlines logo]()
$490
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:44 pm
PHL
- IDA
1 stop22h 22m
Alaska Airlines
Tue 8/254:14 pm
IDA
- PHL
1 stop21h 30m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$460
This Delta deal was found by Cheapflights users on 4/24. 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 5/265:17 am
PHL
- BOI
2 stops10h 01m
Delta
Thu 5/286:00 am
BOI
- PHL
2 stops14h 12m
Delta
Deal found 4/24![Delta logo]()
$290
This United Airlines deal was found by Cheapflights users on 4/27. 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 5/304:14 pm
PHL
- SUN
1 stop7h 12m
United Airlines
Tue 6/22:38 pm
SUN
- PHL
1 stop6h 52m
United Airlines
Deal found 4/27![United Airlines logo]()
$511
This Delta deal was found by Cheapflights users on 4/25. 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 9/37:05 am
PHL
- BOI
1 stop10h 33m
Delta
Sat 9/191:43 pm
BOI
- PHL
1 stop8h 44m
Delta
Deal found 4/25![Delta logo]()
$299
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:04 pm
PHL
- SUN
1 stop17h 35m
Alaska Airlines
Thu 9/1010:28 am
SUN
- PHL
1 stop17h 12m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$514
This United Airlines deal was found by Cheapflights users on 4/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/410:00 am
PHL
- WYS
1 stop8h 29m
United Airlines
Sat 7/112:07 pm
WYS
- PHL
2 stops8h 50m
United Airlines
Deal found 4/25![United Airlines logo]()
$537
This Delta deal was found by Cheapflights users on 4/24. 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 8/266:40 pm
PHL
- GEG
1 stop7h 55m
Delta
Wed 9/27:21 pm
GEG
- PHL
2 stops10h 15m
Delta
Deal found 4/24![Delta logo]()
$304
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 9/134:44 pm
PHL
- IDA
1 stop22h 22m
Alaska Airlines
Fri 9/256:18 am
IDA
- PHL
2 stops31h 26m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$517
This Delta deal was found by Cheapflights users on 4/26. 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.
Mon 6/295:15 am
PHL
- GEG
2 stops11h 03m
Delta
Sat 7/47:00 am
GEG
- PHL
1 stop7h 35m
Delta
Deal found 4/26![Delta logo]()
$304
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/1211:32 am
PHL
- JAC
2 stops11h 26m
United Airlines
Fri 5/152:30 pm
JAC
- PHL
1 stop7h 13m
United Airlines
Deal found 4/28![United Airlines logo]()
$565
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 8/293:25 pm
BOI
- PHL
1 stop6h 15m
Delta
Deal found 4/28![Delta logo]()
$304
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:00 am
PHL
- SUN
1 stop28h 38m
Alaska Airlines
Mon 10/1910:20 am
SUN
- PHL
1 stop17h 07m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$569
This United Airlines deal was found by Cheapflights users on 4/26. 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.
Fri 5/294:14 pm
PHL
- WYS
1 stop26h 23m
United Airlines
Tue 6/22:19 pm
WYS
- PHL
2 stops8h 26m
United Airlines
Deal found 4/26![United Airlines logo]()
$610
Last-minute flights from Philadelphia to IdahoDiscover last-minute flight deals from Philadelphia to Idaho. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Idaho. Data last updated April 29, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/138:35 pm
PHL
- BOI
1 stop17h 52m
Frontier
Sun 5/171:22 pm
BOI
- PHL
1 stop14h 15m
Frontier
Deal found 4/28![Frontier logo]()
$248
This Delta deal was found by Cheapflights users on 4/26. 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.
Tue 5/192:23 pm
PHL
- GEG
1 stop9h 57m
Delta
Sat 5/232:16 pm
GEG
- PHL
1 stop6h 06m
Delta
Deal found 4/26![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/217:34 am
PHL
- GEG
1 stop8h 40m
American Airlines
Wed 5/272:08 pm
GEG
- PHL
1 stop7h 23m
American Airlines
Deal found 4/29![American Airlines logo]()
$306
This Delta deal was found by Cheapflights users on 4/27. 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.
Fri 5/225:17 am
PHL
- GEG
2 stops10h 54m
Delta
Mon 5/257:23 pm
GEG
- PHL
1 stop7h 14m
Delta
Deal found 4/27![Delta logo]()
$317
This Delta deal was found by Cheapflights users on 4/26. 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.
Tue 5/265:17 am
PHL
- JAC
2 stops13h 42m
Delta
Tue 6/27:00 am
JAC
- PHL
1 stop5h 49m
Delta
Deal found 4/26![Delta logo]()
$242
This Delta deal was found by Cheapflights users on 4/24. 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 5/265:17 am
PHL
- BOI
1 stop9h 26m
Delta
Thu 5/286:00 am
BOI
- PHL
2 stops14h 12m
Delta
Deal found 4/24![Delta logo]()
$284
This American Airlines deal was found by Cheapflights users on 4/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:00 am
PHL
- BOI
1 stop7h 29m
American Airlines
Thu 5/283:11 pm
BOI
- PHL
1 stop7h 20m
American Airlines
Deal found 4/27![American Airlines logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/267:00 am
PHL
- GEG
1 stop9h 04m
Alaska Airlines
Tue 6/212:46 pm
GEG
- PHL
1 stop13h 49m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$312
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/277:00 am
PHL
- GEG
1 stop10h 39m
American Airlines
Wed 6/32:14 pm
GEG
- PHL
1 stop7h 24m
American Airlines
Deal found 4/29![American Airlines logo]()
$301
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/277:10 am
PHL
- GEG
1 stop8h 03m
Delta
Sun 5/317:23 pm
GEG
- PHL
1 stop7h 14m
Delta
Deal found 4/28![Delta logo]()
$318
This Delta deal was found by Cheapflights users on 4/26. 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 5/286:45 pm
PHL
- GEG
1 stop7h 50m
Delta
Sun 5/317:23 pm
GEG
- PHL
1 stop7h 14m
Delta
Deal found 4/26![Delta logo]()
$314
This Delta deal was found by Cheapflights users on 4/26. 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 5/296:45 pm
PHL
- BOI
1 stop7h 19m
Delta
Fri 6/56:41 pm
BOI
- PHL
1 stop9h 29m
Delta
Deal found 4/26![Delta logo]()
$314
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 29, 2026.
Search for one-way flight options from Philadelphia to Idaho. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Booking.com deal was found by Cheapflights users on 4/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:35 pm
PHL
- BOI
1 stop17h 55m
Frontier
Deal found 4/24![Frontier logo]()
$86
This Booking.com deal was found by Cheapflights users on 4/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:35 pm
PHL
- BOI
1 stop18h 03m
Frontier
Deal found 4/26![Frontier logo]()
$111
This United Airlines deal was found by Cheapflights users on 4/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/256:00 am
PHL
- JAC
1 stop7h 35m
United Airlines
Deal found 4/25![United Airlines logo]()
$117
This Delta deal was found by Cheapflights users on 4/25. 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.
Mon 5/255:45 am
PHL
- JAC
2 stops8h 35m
Delta
Deal found 4/25![Delta logo]()
$124
This Booking.com deal was found by Cheapflights users on 4/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/68:35 pm
PHL
- BOI
1 stop18h 03m
Frontier
Deal found 4/27![Frontier logo]()
$131
This Trip.com deal was found by Cheapflights users on 4/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/264:44 pm
PHL
- BOI
1 stop9h 11m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$135
This Delta deal was found by Cheapflights users on 4/25. 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.
Wed 7/86:57 pm
PHL
- GEG
1 stop7h 09m
Delta
Deal found 4/25![Delta logo]()
$140
This United Airlines deal was found by Cheapflights users on 4/27. 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.
Thu 5/286:00 am
PHL
- BOI
1 stop7h 32m
United Airlines
Deal found 4/27![United Airlines logo]()
$140
This Delta deal was found by Cheapflights users on 4/25. 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.
Wed 5/206:12 am
PHL
- GEG
2 stops9h 59m
Delta
Deal found 4/25![Delta logo]()
$145
This Delta deal was found by Cheapflights users on 4/27. 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.
Thu 5/285:18 pm
PHL
- BOI
2 stops8h 28m
Delta
Deal found 4/27![Delta logo]()
$145
This American Airlines deal was found by Cheapflights users on 4/25. 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.
Tue 8/1111:00 am
PHL
- JAC
1 stop10h 04m
American Airlines
Deal found 4/25![American Airlines logo]()
$156
This Delta deal was found by Cheapflights users on 4/26. 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.
Sat 8/155:30 am
PHL
- GEG
1 stop8h 54m
Delta
Deal found 4/26![Delta logo]()
$160
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 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $242 (Delta) |
One-way from | $86 (Booking.com) |
Popular in | December |
Cheapest in | September |
Average price | $410 |
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 29, 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 7/22
2:32 pm-9:33 pm
1 stop10h 01m
Spokane
Mon 7/27
7:00 am-6:04 pm
1 stop8h 04m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Wed 8/19
5:30 am-11:24 am
1 stop8h 54m
Spokane
Wed 9/2
7:21 pm-6:05 am
1 stop7h 44m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Mon 8/3
5:40 am-11:39 am
1 stop8h 59m
Spokane
Thu 8/13
7:21 pm-6:05 am
1 stop7h 44m
$279
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Wed 6/24
5:12 pm-10:35 pm
1 stop7h 23m
Boise Air Term. Gowen Fld
Tue 6/30
2:50 pm-11:59 pm
1 stop7h 09m
$279
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 6/2
7:01 pm-11:06 pm
1 stop7h 05m
Spokane
Tue 6/9
7:08 pm-8:44 am
2 stops10h 36m
$284
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 7/21
5:28 pm-11:55 pm
2 stops9h 27m
Spokane
Tue 7/28
5:37 pm-5:29 am
1 stop8h 52m
$284
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Mon 6/22
4:10 pm-12:09 am
2 stops9h 59m
Boise Air Term. Gowen Fld
Mon 6/29
6:43 am-5:35 pm
1 stop8h 52m
$284
PhiladelphiaSpokane
PHL - GEG
PHLGEG
Philadelphia
Tue 5/19
5:17 am-1:11 pm
2 stops10h 54m
Spokane
Sat 5/23
4:59 pm-9:23 am
2 stops13h 24m
$290
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Tue 5/26
5:17 am-1:18 pm
2 stops10h 01m
Boise Air Term. Gowen Fld
Thu 5/28
6:00 am-10:12 pm
2 stops14h 12m
$290
PhiladelphiaBoise
PHL - BOI
PHLBOI
Philadelphia
Thu 9/3
7:05 am-3:38 pm
1 stop10h 33m
Boise Air Term. Gowen Fld
Sat 9/19
1:43 pm-12:27 am
1 stop8h 44m
$299
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-JAC
PHL-BOI
PHL-GEG
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-JAC
PHL-BOI
PHL-GEG
PHL-IDA
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 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Philadelphia to Idaho?
Currently, August is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $131). 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?
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 29, 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.
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
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
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 April 29, 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 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$200 | Average$488 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$489 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$577 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$371 | Average$485 | FlexibilityNo cancel fee | On-time63% |