$101+ Cheap flights from Idaho to Philadelphia (PHL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — PHL
Aug 8 — Aug 151
Round-trip
1 adult, Economy
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Cheapest flights from Idaho to PhiladelphiaExplore the most affordable flight options available from Idaho to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 9, 2026.
Explore the most affordable flight options available from Idaho to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 9, 2026.
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:10 pm
BOI
- PHL
1 stop8h 28m
Delta
Thu 8/202:31 pm
PHL
- BOI
1 stop9h 26m
Delta
Deal found 7/7![Delta logo]()
$201
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:15 pm
GEG
- PHL
1 stop7h 50m
Delta
Mon 8/107:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Deal found 7/8![Delta logo]()
$207
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/152:53 pm
BOI
- PHL
1 stop7h 03m
Delta
Mon 8/177:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/8![Delta logo]()
$226
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:10 pm
BOI
- PHL
1 stop8h 28m
Delta
Fri 8/217:20 am
PHL
- BOI
1 stop6h 54m
Delta
Deal found 7/7![Delta logo]()
$228
This Southwest deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:30 am
BOI
- PHL
1 stop7h 35m
Southwest
Mon 8/315:25 am
PHL
- BOI
1 stop7h 25m
Southwest
Deal found 7/6![Southwest logo]()
$236
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:00 am
BOI
- PHL
2 stops10h 00m
Southwest
Thu 8/205:25 am
PHL
- BOI
1 stop7h 25m
Southwest
Deal found 7/7![Southwest logo]()
$241
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/711:10 pm
BOI
- PHL
1 stop9h 14m
Delta
Fri 8/147:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/8![Delta logo]()
$251
This Booking.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:24 pm
BOI
- PHL
1 stop14h 15m
Frontier
Wed 8/198:37 pm
PHL
- BOI
1 stop16h 52m
Frontier
Deal found 7/6![Frontier logo]()
$252
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/153:22 pm
BOI
- PHL
1 stop6h 18m
Delta
Sun 12/206:40 pm
PHL
- BOI
1 stop7h 24m
Delta
Deal found 7/8![Delta logo]()
$280
This Booking.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:24 pm
BOI
- PHL
1 stop14h 15m
Multiple Airlines
Wed 8/197:02 am
PHL
- BOI
1 stop10h 29m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$285
This Booking.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:24 pm
BOI
- PHL
1 stop20h 25m
Multiple Airlines
Wed 7/155:46 pm
PHL
- BOI
1 stop8h 02m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$286
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/201:59 pm
BOI
- PHL
1 stop9h 20m
Delta
Mon 8/247:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/7![Delta logo]()
$301
Best flights from Idaho to PhiladelphiaDiscover carefully curated flight deals from Idaho to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 9, 2026.
Discover carefully curated flight deals from Idaho to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 9, 2026.
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:56 pm
GEG
- PHL
1 stop9h 00m
Delta
Mon 10/195:25 am
PHL
- GEG
1 stop9h 21m
Delta
Deal found 7/8![Delta logo]()
$207
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/242:55 pm
BOI
- PHL
1 stop6h 50m
Southwest
Mon 8/314:05 pm
PHL
- BOI
2 stops9h 50m
Southwest
Deal found 7/8![Southwest logo]()
$241
This Alaska Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:12 am
GEG
- PHL
1 stop7h 33m
Alaska Airlines
Wed 9/24:48 pm
PHL
- GEG
1 stop9h 23m
Alaska Airlines
Deal found 7/8![Alaska Airlines logo]()
$333
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:36 am
BOI
- PHL
2 stops12h 23m
United Airlines
Tue 9/13:48 pm
PHL
- BOI
1 stop8h 52m
United Airlines
Deal found 7/7![United Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:15 pm
GEG
- PHL
1 stop7h 50m
Delta
Mon 8/107:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Deal found 7/8![Delta logo]()
$207
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:06 pm
GEG
- PHL
1 stop7h 59m
Delta
Mon 9/286:55 pm
PHL
- GEG
1 stop8h 02m
Delta
Deal found 7/8![Delta logo]()
$207
This American Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/221:53 pm
IDA
- PHL
1 stop8h 42m
American Airlines
Sat 9/127:00 am
PHL
- IDA
1 stop8h 28m
American Airlines
Deal found 7/8![American Airlines logo]()
$559
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:55 am
GEG
- PHL
2 stops11h 10m
Southwest
Mon 9/285:25 am
PHL
- GEG
1 stop7h 50m
Southwest
Deal found 7/8![Southwest logo]()
$325
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/153:22 pm
BOI
- PHL
1 stop6h 18m
Delta
Sun 12/206:40 pm
PHL
- BOI
1 stop7h 24m
Delta
Deal found 7/8![Delta logo]()
$280
This Alaska Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:12 am
GEG
- PHL
1 stop7h 33m
Alaska Airlines
Sat 9/54:48 pm
PHL
- GEG
1 stop9h 23m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$360
This Southwest deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:00 am
GEG
- PHL
2 stops10h 55m
Southwest
Mon 8/244:05 pm
PHL
- GEG
2 stops10h 10m
Southwest
Deal found 7/6![Southwest logo]()
$333
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3011:10 pm
BOI
- PHL
1 stop8h 21m
Delta
Mon 8/37:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/8![Delta logo]()
$301
This Alaska Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:03 am
BOI
- PHL
1 stop7h 53m
Alaska Airlines
Tue 9/17:02 am
PHL
- BOI
1 stop10h 29m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$385
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:00 am
GEG
- PHL
2 stops11h 05m
Southwest
Fri 8/144:05 pm
PHL
- GEG
2 stops10h 10m
Southwest
Deal found 7/7![Southwest logo]()
$357
This Delta deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/201:59 pm
BOI
- PHL
1 stop9h 20m
Delta
Tue 8/257:20 am
PHL
- BOI
1 stop6h 54m
Delta
Deal found 7/5![Delta logo]()
$301
This United Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/262:28 pm
IDA
- PHL
1 stop6h 52m
United Airlines
Thu 10/810:05 am
PHL
- IDA
1 stop7h 19m
United Airlines
Deal found 7/4![United Airlines logo]()
$471
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:55 am
BOI
- PHL
1 stop6h 35m
Southwest
Thu 10/155:20 am
PHL
- BOI
1 stop11h 45m
Southwest
Deal found 7/8![Southwest logo]()
$362
This Delta deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Sun 8/307:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/6![Delta logo]()
$304
This Delta deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:10 pm
BOI
- PHL
1 stop8h 28m
Delta
Sun 8/237:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/5![Delta logo]()
$304
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:00 am
GEG
- PHL
1 stop7h 00m
Southwest
Mon 8/1010:20 am
PHL
- GEG
2 stops9h 10m
Southwest
Deal found 7/8![Southwest logo]()
$370
This United Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:40 pm
JAC
- PHL
1 stop7h 06m
United Airlines
Sat 11/710:00 am
PHL
- JAC
1 stop7h 43m
United Airlines
Deal found 7/6![United Airlines logo]()
$493
This Southwest deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:15 am
GEG
- PHL
2 stops11h 40m
Southwest
Sun 10/44:45 pm
PHL
- GEG
2 stops11h 15m
Southwest
Deal found 7/5![Southwest logo]()
$378
This Alaska Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:57 pm
IDA
- PHL
2 stops23h 42m
Alaska Airlines
Mon 10/56:39 pm
PHL
- IDA
1 stop22h 56m
Alaska Airlines
Deal found 7/5![Alaska Airlines logo]()
$516
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:33 pm
IDA
- PHL
1 stop7h 10m
United Airlines
Sun 8/238:00 am
PHL
- IDA
1 stop9h 23m
United Airlines
Deal found 7/5![United Airlines logo]()
$532
This Delta deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/37:07 pm
GEG
- PHL
1 stop7h 34m
Delta
Wed 1/136:15 am
PHL
- GEG
1 stop8h 29m
Delta
Deal found 7/4![Delta logo]()
$335
This Southwest deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
BOI
- PHL
2 stops10h 00m
Southwest
Mon 8/244:05 pm
PHL
- BOI
2 stops9h 30m
Southwest
Deal found 7/5![Southwest logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:53 am
SUN
- PHL
1 stop15h 47m
Alaska Airlines
Tue 11/35:49 pm
PHL
- SUN
1 stop19h 02m
Alaska Airlines
Deal found 7/5![Alaska Airlines logo]()
$555
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 pm
IDA
- PHL
1 stop9h 05m
Delta
Mon 8/317:20 am
PHL
- IDA
1 stop9h 15m
Delta
Deal found 7/7![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:06 am
SUN
- PHL
2 stops12h 14m
United Airlines
Tue 9/2911:20 am
PHL
- SUN
2 stops12h 05m
United Airlines
Deal found 7/7![United Airlines logo]()
$579
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:30 am
BOI
- PHL
2 stops11h 35m
Southwest
Sun 8/167:20 am
PHL
- BOI
2 stops10h 50m
Southwest
Deal found 7/7![Southwest logo]()
$405
Last-minute flights from Idaho to PhiladelphiaDiscover last-minute flight deals from Idaho to Philadelphia. Data last updated July 9, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Philadelphia. Data last updated July 9, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:24 pm
BOI
- PHL
1 stop20h 25m
Multiple Airlines
Wed 7/155:46 pm
PHL
- BOI
1 stop8h 02m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$286
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:15 pm
GEG
- PHL
1 stop7h 50m
Delta
Mon 8/107:00 pm
PHL
- GEG
1 stop7h 53m
Delta
Deal found 7/8![Delta logo]()
$207
This Booking.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:24 pm
BOI
- PHL
1 stop14h 15m
Frontier
Wed 8/198:37 pm
PHL
- BOI
1 stop16h 52m
Frontier
Deal found 7/6![Frontier logo]()
$252
This Booking.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:24 pm
BOI
- PHL
1 stop14h 15m
Multiple Airlines
Wed 8/197:02 am
PHL
- BOI
1 stop10h 29m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$285
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/711:10 pm
BOI
- PHL
1 stop9h 14m
Delta
Fri 8/147:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/8![Delta logo]()
$251
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:00 am
BOI
- PHL
2 stops10h 00m
Southwest
Thu 8/205:25 am
PHL
- BOI
1 stop7h 25m
Southwest
Deal found 7/7![Southwest logo]()
$241
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:10 pm
BOI
- PHL
1 stop8h 28m
Delta
Wed 8/196:55 pm
PHL
- BOI
1 stop7h 04m
Delta
Deal found 7/7![Delta logo]()
$201
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:10 pm
BOI
- PHL
1 stop8h 28m
Delta
Fri 8/217:20 am
PHL
- BOI
1 stop6h 54m
Delta
Deal found 7/7![Delta logo]()
$228
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Fri 8/146:05 pm
PHL
- GEG
1 stop7h 35m
Southwest
Deal found 7/7![Southwest logo]()
$302
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/152:53 pm
BOI
- PHL
1 stop7h 03m
Delta
Mon 8/177:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/8![Delta logo]()
$226
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/201:59 pm
BOI
- PHL
1 stop9h 20m
Delta
Mon 8/247:00 pm
PHL
- BOI
1 stop6h 59m
Delta
Deal found 7/7![Delta logo]()
$301
This Southwest deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:30 am
BOI
- PHL
1 stop7h 35m
Southwest
Mon 8/315:25 am
PHL
- BOI
1 stop7h 25m
Southwest
Deal found 7/6![Southwest logo]()
$236
One-way flights from Idaho to PhiladelphiaSearch for one-way flight options from Idaho to Philadelphia. Find affordable one-way fares based on user searches. Data last updated July 9, 2026.
Search for one-way flight options from Idaho to Philadelphia. Find affordable one-way fares based on user searches. Data last updated July 9, 2026.
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/173:00 pm
BOI
- PHL
1 stop6h 44m
Delta
Deal found 7/8![Delta logo]()
$101
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:49 pm
GEG
- PHL
1 stop9h 01m
Delta
Deal found 7/8![Delta logo]()
$104
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:00 am
BOI
- PHL
2 stops10h 00m
Southwest
Deal found 7/7![Southwest logo]()
$106
This American Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:19 pm
BOI
- PHL
1 stop6h 40m
American Airlines
Deal found 7/8![American Airlines logo]()
$126
This Booking.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:24 pm
BOI
- PHL
1 stop15h 15m
Frontier
Deal found 7/4![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:24 pm
BOI
- PHL
1 stop15h 15m
Frontier
Deal found 7/8![Frontier logo]()
$137
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:45 am
GEG
- PHL
1 stop8h 14m
Delta
Deal found 7/8![Delta logo]()
$147
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:15 pm
GEG
- PHL
1 stop7h 50m
Delta
Deal found 7/8![Delta logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/143:52 pm
BOI
- PHL
2 stops35h 44m
Frontier
Deal found 7/8![Frontier logo]()
$153
This Delta deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:28 pm
BOI
- PHL
1 stop8h 22m
Delta
Deal found 7/6![Delta logo]()
$154
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:15 am
BOI
- PHL
2 stops11h 10m
United Airlines
Deal found 7/5![United Airlines logo]()
$156
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:37 pm
GEG
- PHL
1 stop8h 52m
Delta
Deal found 7/7![Delta logo]()
$156
Find flight deals from Idaho to Philadelphia
Keep the following information in mind while searching for Idaho to Philadelphia flight deals. Data was last updated July 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $201 (Delta) |
One-way from | $101 (Delta) |
Popular in | February |
Cheapest in | January |
Average price | $398 |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho to Philadelphia 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 July 9, 2026.
Use the filters below to find and compare flights from Idaho to Philadelphia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Thu 10/15
12:56 pm-12:56 am
1 stop9h 00m
Philadelphia
Mon 10/19
5:25 am-11:46 am
1 stop9h 21m
$207
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Thu 8/6
7:15 pm-6:05 am
1 stop7h 50m
Philadelphia
Mon 8/10
7:00 pm-11:53 pm
1 stop7h 53m
$207
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Thu 9/24
7:06 pm-6:05 am
1 stop7h 59m
Philadelphia
Mon 9/28
6:55 pm-11:57 pm
1 stop8h 02m
$207
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Mon 8/24
2:55 pm-11:45 pm
1 stop6h 50m
Philadelphia
Mon 8/31
4:05 pm-11:55 pm
2 stops9h 50m
$241
Quickest round-trip
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Tue 12/15
3:22 pm-11:40 pm
1 stop6h 18m
Philadelphia
Sun 12/20
6:40 pm-12:04 am
1 stop7h 24m
$280
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Thu 7/30
11:10 pm-9:31 am
1 stop8h 21m
Philadelphia
Mon 8/3
7:00 pm-11:59 pm
1 stop6h 59m
$301
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Thu 8/20
1:59 pm-1:19 am
1 stop9h 20m
Philadelphia
Tue 8/25
7:20 am-12:14 pm
1 stop6h 54m
$301
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Wed 8/26
5:59 pm-5:50 am
1 stop9h 51m
Philadelphia
Sun 8/30
7:00 pm-11:59 pm
1 stop6h 59m
$304
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Thu 8/20
11:10 pm-9:38 am
1 stop8h 28m
Philadelphia
Sun 8/23
7:00 pm-11:59 pm
1 stop6h 59m
$304
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Thu 9/24
6:55 am-9:05 pm
2 stops11h 10m
Philadelphia
Mon 9/28
5:25 am-10:15 am
1 stop7h 50m
$325
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Idaho to Philadelphia
Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Idaho with our price prediction graph.
BOI-PHL
GEG-PHL
IDA-PHL
JAC-PHL
SUN-PHL
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 Idaho to Philadelphia
USID-PHL
BOI-PHL
GEG-PHL
IDA-PHL
JAC-PHL
What is the cheapest month to book a flight from Idaho to Philadelphia?
Currently, May is the cheapest month in which you can book a flight from Idaho to Philadelphia (average of $208). Flying from Idaho to Philadelphia in November is currently the most expensive (average of $377). 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 Idaho to Philadelphia?
Related info for your journey
Find useful and relevant information for your journey from Idaho to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Philadelphia?
Book flights to Philadelphia if you plan to visit one of these locationsWildwood
King of Prussia
Reading
Camden
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Dewey Beach
Wildwood Crest
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
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.
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Philadelphia flight routes
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Alternative routes for Idaho to Philadelphia
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Complete your trip
Complete your trip to Philadelphia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Idaho to Philadelphia by cabin class
Find flights from Idaho to Philadelphia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Idaho and Philadelphia flights
Browse other Idaho and Philadelphia flight options. Last updated on July 9, 2026.
Other flights to Philadelphia
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Idaho to Philadelphia flights
Consider these flights traveling from Idaho to Philadelphia.
Top 4 airlines flying from Idaho to Philadelphia
Discover the top 4 airlines that operate flights from Idaho to Philadelphia. 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 July 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$775 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$259 | Average$413 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$306 | Average$526 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$553 | FlexibilityNo cancel fee | On-time63% |