$99+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — PHL
Jul 10 — Jul 171
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Philadelphia 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
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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 June 10, 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 June 10, 2026.
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:22 pm
BOI
- PHL
1 stop6h 18m
Delta
Thu 10/296:15 am
PHL
- BOI
1 stop8h 27m
Delta
Deal found 6/9![Delta logo]()
$209
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:30 pm
BOI
- PHL
1 stop8h 33m
Delta
Mon 11/25:30 am
PHL
- BOI
1 stop9h 09m
Delta
Deal found 6/9![Delta logo]()
$221
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/112:05 pm
GEG
- PHL
1 stop6h 35m
Delta
Mon 9/146:59 pm
PHL
- GEG
1 stop7h 05m
Delta
Deal found 6/9![Delta logo]()
$238
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/52:53 pm
BOI
- PHL
1 stop7h 03m
Delta
Mon 9/76:55 pm
PHL
- BOI
1 stop7h 04m
Delta
Deal found 6/9![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:40 pm
GEG
- PHL
1 stop9h 10m
Delta
Mon 10/127:05 am
PHL
- GEG
1 stop8h 57m
Delta
Deal found 6/9![Delta logo]()
$250
This American Airlines deal was found by Cheapflights users on 6/8. 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.
Mon 10/263:44 pm
GEG
- PHL
1 stop10h 51m
American Airlines
Wed 12/27:35 am
PHL
- GEG
1 stop7h 55m
American Airlines
Deal found 6/8![American Airlines logo]()
$265
This Delta deal was found by Cheapflights users on 6/8. 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 8/212:53 pm
BOI
- PHL
1 stop7h 03m
Delta
Sun 8/235:15 am
PHL
- BOI
1 stop9h 34m
Delta
Deal found 6/8![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 6/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am
GEG
- PHL
1 stop7h 25m
Alaska Airlines
Wed 11/115:49 pm
PHL
- GEG
1 stop9h 10m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 6/5. 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.
Tue 8/185:59 pm
BOI
- PHL
1 stop9h 41m
Delta
Mon 8/245:15 am
PHL
- BOI
1 stop9h 34m
Delta
Deal found 6/5![Delta logo]()
$289
This Delta deal was found by Cheapflights users on 6/5. 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 10/155:00 pm
GEG
- PHL
1 stop9h 41m
Delta
Mon 10/197:05 am
PHL
- GEG
1 stop10h 40m
Delta
Deal found 6/5![Delta logo]()
$289
This Delta deal was found by Cheapflights users on 6/7. 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.
Fri 6/196:42 pm
BOI
- PHL
1 stop9h 26m
Delta
Wed 6/245:40 am
PHL
- BOI
1 stop7h 18m
Delta
Deal found 6/7![Delta logo]()
$293
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:55 am
BOI
- PHL
2 stops10h 10m
Southwest
Mon 11/25:00 am
PHL
- BOI
1 stop7h 40m
Southwest
Deal found 6/9![Southwest logo]()
$295
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 June 10, 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 June 10, 2026.
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/112:05 pm
GEG
- PHL
1 stop6h 35m
Delta
Mon 9/146:59 pm
PHL
- GEG
1 stop7h 05m
Delta
Deal found 6/9![Delta logo]()
$238
This Alaska Airlines deal was found by Cheapflights users on 6/8. 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 11/105:00 am
GEG
- PHL
1 stop7h 25m
Alaska Airlines
Wed 11/115:49 pm
PHL
- GEG
1 stop8h 07m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:55 am
BOI
- PHL
2 stops10h 10m
Southwest
Mon 11/25:00 am
PHL
- BOI
1 stop7h 40m
Southwest
Deal found 6/9![Southwest logo]()
$295
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Wed 10/282:35 pm
IDA
- PHL
1 stop6h 11m
United Airlines
Sat 10/3110:15 am
PHL
- IDA
2 stops9h 07m
United Airlines
Deal found 6/7![United Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/52:53 pm
BOI
- PHL
1 stop7h 03m
Delta
Mon 9/76:55 pm
PHL
- BOI
1 stop7h 04m
Delta
Deal found 6/9![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2111:10 pm
BOI
- PHL
1 stop9h 14m
Delta
Sun 8/235:15 am
PHL
- BOI
1 stop9h 34m
Delta
Deal found 6/9![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 6/5. 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 10/176:40 am
BOI
- PHL
1 stop8h 59m
Alaska Airlines
Wed 10/214:06 pm
PHL
- BOI
1 stop9h 48m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 6/7. 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 10/1512:40 pm
GEG
- PHL
1 stop9h 11m
Delta
Mon 10/197:05 am
PHL
- GEG
1 stop10h 40m
Delta
Deal found 6/7![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:55 am
GEG
- PHL
2 stops11h 10m
Southwest
Mon 9/146:05 pm
PHL
- GEG
1 stop7h 35m
Southwest
Deal found 6/9![Southwest logo]()
$341
This Alaska Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:12 am
GEG
- PHL
1 stop7h 33m
Alaska Airlines
Sun 8/307:02 am
PHL
- GEG
1 stop8h 29m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 6/7. 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 10/85:40 pm
GEG
- PHL
1 stop9h 23m
Delta
Mon 10/127:05 am
PHL
- GEG
1 stop8h 57m
Delta
Deal found 6/7![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 6/5. 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.
Fri 9/182:55 pm
BOI
- PHL
1 stop6h 50m
Southwest
Mon 9/214:05 pm
PHL
- BOI
2 stops9h 30m
Southwest
Deal found 6/5![Southwest logo]()
$364
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/103:25 pm
BOI
- PHL
1 stop6h 15m
Delta
Sun 9/136:15 am
PHL
- BOI
1 stop9h 48m
Delta
Deal found 6/6![Delta logo]()
$289
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Tue 11/32:40 pm
JAC
- PHL
1 stop6h 06m
United Airlines
Sat 11/710:00 am
PHL
- JAC
1 stop7h 12m
United Airlines
Deal found 6/4![United Airlines logo]()
$460
This Delta deal was found by Cheapflights users on 6/5. 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 9/175:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Mon 9/216:59 pm
PHL
- BOI
1 stop6h 56m
Delta
Deal found 6/5![Delta logo]()
$289
This Alaska Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:00 am
BOI
- PHL
1 stop7h 45m
Alaska Airlines
Sun 8/234:48 pm
PHL
- BOI
1 stop9h 07m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$388
This Southwest deal was found by Cheapflights users on 6/7. 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.
Sat 9/56:10 am
BOI
- PHL
2 stops12h 35m
Southwest
Mon 9/74:05 pm
PHL
- BOI
2 stops9h 30m
Southwest
Deal found 6/7![Southwest logo]()
$403
This Alaska Airlines deal was found by Cheapflights users on 6/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:45 pm
GEG
- PHL
1 stop7h 28m
Alaska Airlines
Tue 7/214:26 pm
PHL
- GEG
1 stop10h 33m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$392
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/272:40 pm
JAC
- PHL
1 stop6h 06m
United Airlines
Wed 10/2810:00 am
PHL
- JAC
1 stop7h 12m
United Airlines
Deal found 6/8![United Airlines logo]()
$488
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:30 pm
GEG
- PHL
1 stop6h 40m
Southwest
Mon 10/125:25 am
PHL
- GEG
1 stop7h 20m
Southwest
Deal found 6/9![Southwest logo]()
$419
This Alaska Airlines deal was found by Cheapflights users on 6/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:09 am
IDA
- PHL
1 stop9h 30m
Alaska Airlines
Sat 10/317:00 am
PHL
- IDA
1 stop10h 35m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 6/6. 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.
Sat 8/16:07 pm
BOI
- PHL
1 stop9h 22m
Delta
Sat 8/87:05 am
PHL
- BOI
1 stop10h 13m
Delta
Deal found 6/6![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 6/6. 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 10/282:29 pm
SUN
- PHL
1 stop6h 17m
United Airlines
Sat 10/318:00 am
PHL
- SUN
1 stop7h 44m
United Airlines
Deal found 6/6![United Airlines logo]()
$511
This Delta deal was found by Cheapflights users on 6/7. 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 6/2512:35 pm
GEG
- PHL
1 stop8h 23m
Delta
Mon 6/296:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 6/7![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 6/6. 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.
Thu 9/177:50 am
SUN
- PHL
1 stop9h 39m
United Airlines
Wed 9/233:48 pm
PHL
- SUN
1 stop7h 24m
United Airlines
Deal found 6/6![United Airlines logo]()
$511
This Alaska Airlines deal was found by Cheapflights users on 6/8. 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 6/304:14 pm
IDA
- PHL
1 stop21h 09m
Alaska Airlines
Tue 7/75:46 pm
PHL
- IDA
1 stop21h 20m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/165:37 pm
GEG
- PHL
1 stop8h 52m
Delta
Tue 7/212:32 pm
PHL
- GEG
1 stop10h 00m
Delta
Deal found 6/5![Delta logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 6/8. 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.
Fri 10/23:57 pm
IDA
- PHL
2 stops35h 43m
Alaska Airlines
Mon 10/54:06 pm
PHL
- IDA
1 stop23h 00m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$481
This Delta deal was found by Cheapflights users on 6/7. 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 7/236:07 pm
BOI
- PHL
1 stop9h 22m
Delta
Thu 7/306:55 pm
PHL
- BOI
1 stop7h 10m
Delta
Deal found 6/7![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/267:08 pm
GEG
- PHL
1 stop8h 00m
Delta
Mon 6/296:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 6/9![Delta logo]()
$399
Last-minute flights from Idaho to PhiladelphiaDiscover last-minute flight deals from Idaho to Philadelphia. Data last updated June 10, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Philadelphia. Data last updated June 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/5. 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.
Tue 6/1612:47 pm
GEG
- PHL
1 stop9h 12m
Delta
Tue 6/236:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 6/5![Delta logo]()
$311
This American Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/168:11 am
BOI
- PHL
1 stop10h 45m
American Airlines
Fri 7/34:22 pm
PHL
- BOI
1 stop8h 59m
American Airlines
Deal found 6/9![American Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 6/8. 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 6/1812:35 pm
GEG
- PHL
1 stop8h 23m
Delta
Sun 6/215:40 am
PHL
- GEG
1 stop9h 00m
Delta
Deal found 6/8![Delta logo]()
$323
This American Airlines deal was found by Cheapflights users on 6/8. 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.
Thu 6/182:01 pm
GEG
- PHL
1 stop7h 38m
American Airlines
Sat 6/204:17 pm
PHL
- GEG
1 stop9h 52m
American Airlines
Deal found 6/8![American Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 6/7. 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.
Fri 6/196:42 pm
BOI
- PHL
1 stop9h 26m
Delta
Wed 6/245:40 am
PHL
- BOI
1 stop7h 18m
Delta
Deal found 6/7![Delta logo]()
$293
This American Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/253:12 pm
BOI
- PHL
1 stop7h 27m
American Airlines
Mon 6/295:00 am
PHL
- BOI
1 stop8h 18m
American Airlines
Deal found 6/7![American Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 6/7. 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 6/2512:35 pm
GEG
- PHL
1 stop8h 23m
Delta
Mon 6/296:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 6/7![Delta logo]()
$339
This American Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/22:29 pm
GEG
- PHL
1 stop7h 30m
American Airlines
Sat 7/47:42 am
PHL
- GEG
1 stop8h 27m
American Airlines
Deal found 6/9![American Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 6/5. 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.
Fri 7/104:25 pm
BOI
- PHL
1 stop6h 20m
Southwest
Sat 7/185:00 am
PHL
- BOI
1 stop6h 45m
Southwest
Deal found 6/5![Southwest logo]()
$329
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/164:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Tue 7/215:40 am
PHL
- GEG
1 stop8h 59m
Delta
Deal found 6/6![Delta logo]()
$289
This Delta deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:28 pm
BOI
- PHL
1 stop8h 01m
Delta
Tue 8/117:00 am
PHL
- BOI
1 stop10h 18m
Delta
Deal found 6/5![Delta logo]()
$289
This Delta deal was found by Cheapflights users on 6/8. 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
Wed 8/127:05 am
PHL
- BOI
1 stop10h 13m
Delta
Deal found 6/8![Delta logo]()
$338
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 June 10, 2026.
Search for one-way flight options from Idaho to Philadelphia. Find affordable one-way fares based on user searches. Data last updated June 10, 2026.
This Delta deal was found by Cheapflights users on 6/8. 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 8/45:59 pm
BOI
- PHL
1 stop9h 51m
Delta
Deal found 6/8![Delta logo]()
$99
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/173:22 pm
BOI
- PHL
1 stop6h 18m
Delta
Deal found 6/9![Delta logo]()
$111
This Delta deal was found by Cheapflights users on 6/8. 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 8/77:28 pm
BOI
- PHL
1 stop8h 22m
Delta
Deal found 6/8![Delta logo]()
$128
This Delta deal was found by Cheapflights users on 6/8. 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 9/47:28 pm
BOI
- PHL
1 stop8h 22m
Delta
Deal found 6/8![Delta logo]()
$140
This Alaska Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/25:00 am
GEG
- PHL
1 stop7h 23m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$140
This Delta deal was found by Cheapflights users on 6/5. 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.
Mon 7/64:30 pm
GEG
- PHL
1 stop10h 00m
Delta
Deal found 6/5![Delta logo]()
$145
This Delta deal was found by Cheapflights users on 6/8. 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 6/1511:45 pm
BOI
- PHL
1 stop7h 49m
Delta
Deal found 6/8![Delta logo]()
$154
This Alaska Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/305:00 am
GEG
- PHL
1 stop7h 23m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$167
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3012:37 pm
GEG
- PHL
2 stops13h 54m
United Airlines
Deal found 6/6![United Airlines logo]()
$173
This Alaska Airlines deal was found by Cheapflights users on 6/5. 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 6/267:45 pm
GEG
- PHL
1 stop7h 28m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$178
This Priceline deal was found by Cheapflights users on 6/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am
BOI
- PHL
1 stop7h 45m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$180
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:05 pm
BOI
- PHL
1 stop10h 45m
United Airlines
Deal found 6/8![United Airlines logo]()
$183
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 June 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $209 (Delta) |
One-way from | $99 (Delta) |
Popular in | November |
Cheapest in | September |
Average price | $436 |
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 June 10, 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
Fri 9/11
2:05 pm-11:40 pm
1 stop6h 35m
Philadelphia
Mon 9/14
6:59 pm-11:04 pm
1 stop7h 05m
$238
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Sat 9/5
2:53 pm-11:56 pm
1 stop7h 03m
Philadelphia
Mon 9/7
6:55 pm-11:59 pm
1 stop7h 04m
$250
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Fri 8/21
11:10 pm-10:24 am
1 stop9h 14m
Philadelphia
Sun 8/23
5:15 am-12:49 pm
1 stop9h 34m
$267
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Tue 11/10
5:00 am-3:25 pm
1 stop7h 25m
Philadelphia
Wed 11/11
5:49 pm-10:56 pm
1 stop8h 07m
$279
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Thu 10/15
12:40 pm-12:51 am
1 stop9h 11m
Philadelphia
Mon 10/19
7:05 am-2:45 pm
1 stop10h 40m
$279
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Thu 10/8
5:40 pm-6:03 am
1 stop9h 23m
Philadelphia
Mon 10/12
7:05 am-1:02 pm
1 stop8h 57m
$279
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Thu 9/10
3:25 pm-11:40 pm
1 stop6h 15m
Philadelphia
Sun 9/13
6:15 am-2:03 pm
1 stop9h 48m
$289
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Thu 9/17
5:59 pm-5:50 am
1 stop9h 51m
Philadelphia
Mon 9/21
6:59 pm-11:55 pm
1 stop6h 56m
$289
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Thu 10/29
5:55 am-6:05 pm
2 stops10h 10m
Philadelphia
Mon 11/2
5:00 am-10:40 am
1 stop7h 40m
$295
BoisePhiladelphia
BOI - PHL
BOIPHL
Boise Air Term. Gowen Fld
Sat 10/17
6:40 am-5:39 pm
1 stop8h 59m
Philadelphia
Wed 10/21
4:06 pm-11:54 pm
1 stop9h 48m
$319
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
SUN-PHL
IDA-PHL
JAC-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
SUN-PHL
IDA-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
Dewey Beach
Pottstown
Ephrata
Milford
Plymouth Meeting
Wildwood Crest
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland
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 June 10, 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 June 10, 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 June 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$750 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$259 | Average$437 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$306 | Average$542 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$553 | FlexibilityNo cancel fee | On-time63% |