$51+ Cheap flights from Colorado 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Jul 16 — Jul 231
Round-trip
1 adult, Economy
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Cheapest flights from Colorado to IdahoExplore the most affordable flight options available from Colorado to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 16, 2026.
Explore the most affordable flight options available from Colorado to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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.
Tue 7/1410:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Tue 7/211:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/15![Frontier logo]()
$168
This Frontier deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:55 am
DEN
- BOI
Nonstop2h 09m
Frontier
Tue 9/2912:59 pm
BOI
- DEN
Nonstop2h 01m
Frontier
Deal found 6/15![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 9/310:08 am
DEN
- BOI
Nonstop2h 01m
Frontier
Thu 9/1012:59 pm
BOI
- DEN
Nonstop2h 01m
Frontier
Deal found 6/13![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:55 am
DEN
- BOI
Nonstop2h 09m
Frontier
Mon 9/213:52 pm
BOI
- DEN
1 stop8h 23m
Frontier
Deal found 6/11![Frontier logo]()
$180
This Travelocity deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:19 am
DEN
- BOI
Nonstop2h 09m
Multiple Airlines
Thu 10/225:56 am
BOI
- DEN
1 stop8h 36m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$186
This Expedia deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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.
Tue 7/710:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Thu 7/91:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/14![Frontier logo]()
$191
This Expedia deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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.
Wed 7/159:08 pm
DEN
- BOI
1 stop12h 32m
Multiple Airlines
Tue 7/211:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 8/316:17 am
DEN
- BOI
1 stop7h 45m
Multiple Airlines
Tue 9/81:04 pm
BOI
- DEN
Nonstop2h 05m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 9/310:08 am
DEN
- BOI
Nonstop2h 01m
Frontier
Sun 9/61:04 pm
BOI
- DEN
Nonstop2h 05m
Frontier
Deal found 6/13![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:17 am
DEN
- BOI
1 stop7h 45m
Multiple Airlines
Tue 9/81:04 pm
BOI
- DEN
Nonstop2h 05m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$201
This Frontier deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3010:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Thu 8/61:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/15![Frontier logo]()
$202
This Orbitz deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:05 am
DEN
- GEG
1 stop5h 34m
Alaska Airlines
Wed 11/412:26 pm
GEG
- DEN
1 stop8h 02m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$219
Best flights from Colorado to IdahoDiscover carefully curated flight deals from Colorado to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 16, 2026.
Discover carefully curated flight deals from Colorado to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 16, 2026.
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 9/166:20 am
DEN
- GEG
1 stop7h 00m
Delta
Wed 9/2311:10 am
GEG
- DEN
1 stop5h 39m
Delta
Deal found 6/11![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 8/291:50 pm
DEN
- BOI
2 stops7h 05m
Southwest
Fri 9/43:45 pm
BOI
- DEN
1 stop7h 25m
Southwest
Deal found 6/11![Southwest logo]()
$276
This Alaska Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:17 am
DEN
- BOI
1 stop7h 45m
Alaska Airlines
Fri 9/116:49 pm
BOI
- DEN
1 stop17h 31m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 6/273:35 pm
DEN
- IDA
Nonstop1h 44m
United Airlines
Sun 6/2810:35 am
IDA
- DEN
Nonstop1h 53m
United Airlines
Deal found 6/11![United Airlines logo]()
$279
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/86:54 pm
GJT
- GEG
1 stop5h 23m
American Airlines
Wed 7/153:20 pm
GEG
- GJT
1 stop7h 56m
American Airlines
Deal found 6/12![American Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 9/35:35 am
DEN
- BOI
1 stop6h 39m
Delta
Tue 9/811:35 am
BOI
- DEN
1 stop3h 36m
Delta
Deal found 6/11![Delta logo]()
$263
This Alaska Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 9/241:43 pm
DEN
- BOI
1 stop6h 37m
Alaska Airlines
Tue 9/297:20 am
BOI
- DEN
1 stop12h 06m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 9/211:38 am
DEN
- BOI
Nonstop2h 00m
United Airlines
Sun 9/66:30 am
BOI
- DEN
Nonstop2h 01m
United Airlines
Deal found 6/12![United Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/155:40 am
DEN
- BOI
1 stop3h 49m
Delta
Tue 7/216:42 pm
BOI
- DEN
1 stop3h 19m
Delta
Deal found 6/14![Delta logo]()
$265
This Southwest deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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.
Sun 7/266:00 am
COS
- BOI
1 stop6h 30m
Southwest
Wed 7/296:00 am
BOI
- COS
1 stop4h 35m
Southwest
Deal found 6/15![Southwest logo]()
$301
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 8/56:28 pm
DEN
- IDA
1 stop4h 04m
Delta
Sat 8/86:00 am
IDA
- DEN
1 stop3h 14m
Delta
Deal found 6/15![Delta logo]()
$269
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 9/199:10 am
DEN
- GEG
Nonstop2h 15m
Southwest
Sat 10/38:25 am
GEG
- DEN
1 stop8h 05m
Southwest
Deal found 6/11![Southwest logo]()
$301
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/38:25 pm
DEN
- BOI
Nonstop2h 12m
United Airlines
Mon 7/135:46 pm
BOI
- DEN
Nonstop1h 59m
United Airlines
Deal found 6/12![United Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 8/136:53 pm
GJT
- BOI
1 stop5h 06m
Delta
Sat 8/155:15 pm
BOI
- GJT
1 stop4h 41m
Delta
Deal found 6/13![Delta logo]()
$271
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 8/148:32 pm
DEN
- BOI
Nonstop2h 08m
United Airlines
Sun 8/166:30 am
BOI
- DEN
Nonstop2h 01m
United Airlines
Deal found 6/12![United Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 8/276:45 pm
COS
- GEG
1 stop5h 30m
Southwest
Mon 8/315:35 pm
GEG
- COS
1 stop5h 00m
Southwest
Deal found 6/11![Southwest logo]()
$310
This Alaska Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:02 am
DEN
- GEG
1 stop7h 27m
Alaska Airlines
Sat 8/1512:42 pm
GEG
- DEN
1 stop7h 58m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$357
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 6/278:05 am
DEN
- IDA
Nonstop1h 45m
United Airlines
Mon 6/294:14 pm
IDA
- DEN
Nonstop1h 51m
United Airlines
Deal found 6/14![United Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 8/276:28 pm
DEN
- BOI
1 stop5h 31m
Delta
Wed 9/26:45 pm
BOI
- DEN
1 stop4h 10m
Delta
Deal found 6/15![Delta logo]()
$282
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 8/115:20 pm
COS
- GEG
1 stop5h 45m
Southwest
Tue 8/1812:35 pm
GEG
- COS
1 stop5h 35m
Southwest
Deal found 6/12![Southwest logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:22 am
DEN
- GEG
1 stop5h 09m
Alaska Airlines
Wed 8/267:03 am
GEG
- DEN
1 stop13h 10m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$360
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 8/82:20 pm
DEN
- GEG
1 stop6h 12m
Delta
Tue 8/184:20 pm
GEG
- DEN
1 stop6h 38m
Delta
Deal found 6/11![Delta logo]()
$283
This United Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 7/47:28 pm
DEN
- BOI
Nonstop2h 01m
United Airlines
Sat 7/112:40 pm
BOI
- DEN
Nonstop1h 59m
United Airlines
Deal found 6/13![United Airlines logo]()
$317
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 10/277:45 am
DEN
- IDA
Nonstop1h 43m
United Airlines
Tue 11/35:57 pm
IDA
- DEN
Nonstop1h 43m
United Airlines
Deal found 6/14![United Airlines logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/261:43 pm
DEN
- GEG
2 stops11h 16m
Alaska Airlines
Wed 9/305:21 pm
GEG
- DEN
1 stop4h 58m
Alaska Airlines
Deal found 6/12![Alaska Airlines logo]()
$392
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 7/166:56 pm
GJT
- BOI
1 stop5h 09m
Delta
Sat 7/185:15 pm
BOI
- GJT
1 stop4h 40m
Delta
Deal found 6/15![Delta logo]()
$295
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 8/66:45 pm
COS
- GEG
1 stop5h 30m
Southwest
Thu 8/136:55 am
GEG
- COS
2 stops7h 45m
Southwest
Deal found 6/11![Southwest logo]()
$359
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/56:50 pm
GJT
- BOI
1 stop5h 19m
Delta
Sat 7/115:15 pm
BOI
- GJT
1 stop4h 40m
Delta
Deal found 6/11![Delta logo]()
$295
This Southwest deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 7/87:55 pm
COS
- GEG
1 stop5h 15m
Southwest
Tue 7/1412:25 pm
GEG
- COS
1 stop9h 35m
Southwest
Deal found 6/15![Southwest logo]()
$362
This Alaska Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 11/103:11 pm
DEN
- SUN
1 stop19h 40m
Alaska Airlines
Sat 11/1411:33 am
SUN
- DEN
1 stop6h 02m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$405
Last-minute flights from Colorado to IdahoDiscover last-minute flight deals from Colorado to Idaho. Data last updated June 16, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Idaho. Data last updated June 16, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/210:29 am
DEN
- BOI
Nonstop2h 01m
Frontier
Tue 7/71:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/11![Frontier logo]()
$221
This Expedia deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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.
Tue 7/710:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Thu 7/91:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/14![Frontier logo]()
$191
This Expedia deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/910:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Sun 7/121:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/11![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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.
Tue 7/1410:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Tue 7/211:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/15![Frontier logo]()
$168
This Expedia deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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.
Tue 7/146:02 am
DEN
- BOI
1 stop6h 24m
Multiple Airlines
Tue 7/211:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$226
This Expedia deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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.
Wed 7/159:08 pm
DEN
- BOI
1 stop12h 32m
Multiple Airlines
Tue 7/211:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$195
This Frontier deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1610:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Tue 7/211:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/14![Frontier logo]()
$209
This Trip.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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.
Thu 7/166:02 am
DEN
- BOI
1 stop8h 05m
Multiple Airlines
Tue 7/211:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$219
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/188:05 am
DEN
- IDA
Nonstop1h 45m
United Airlines
Mon 7/202:30 pm
IDA
- DEN
Nonstop1h 48m
United Airlines
Deal found 6/14![United Airlines logo]()
$262
This Orbitz deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Thu 7/231:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/13![Frontier logo]()
$208
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Sun 7/261:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/11![Frontier logo]()
$216
This Frontier deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3010:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Thu 8/61:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 6/15![Frontier logo]()
$202
One-way flights from Colorado to IdahoSearch for one-way flight options from Colorado to Idaho. Find affordable one-way fares based on user searches. Data last updated June 16, 2026.
Search for one-way flight options from Colorado to Idaho. Find affordable one-way fares based on user searches. Data last updated June 16, 2026.
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1110:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Deal found 6/11![Frontier logo]()
$51
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Tue 10/69:55 am
DEN
- BOI
Nonstop2h 09m
Frontier
Deal found 6/12![Frontier logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Tue 9/810:08 am
DEN
- BOI
Nonstop2h 01m
Frontier
Deal found 6/12![Frontier logo]()
$60
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/109:55 am
DEN
- BOI
Nonstop2h 09m
Frontier
Deal found 6/11![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 8/2010:08 am
DEN
- BOI
Nonstop2h 01m
Frontier
Deal found 6/12![Frontier logo]()
$73
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Deal found 6/11![Frontier logo]()
$87
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/610:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Deal found 6/11![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:30 am
DEN
- GEG
1 stop25h 49m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” 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 9/310:08 am
DEN
- BOI
Nonstop2h 01m
Frontier
Deal found 6/15![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1410:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Deal found 6/15![Frontier logo]()
$95
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 12/83:57 pm
DEN
- BOI
Nonstop1h 58m
United Airlines
Deal found 6/11![United Airlines logo]()
$96
This CheapOair deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:00 am
DEN
- GEG
1 stop6h 30m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$110
Find flight deals from Colorado to Idaho
Keep the following information in mind while searching for Colorado to Idaho flight deals. Data was last updated June 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $168 (Kiwi.com) |
One-way from | $51 (Frontier) |
Popular in | May |
Cheapest in | February |
Average price | $313 |
Good round-trip deal | $211 or less |
Good one-way deal | $158 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 16, 2026.
Use the filters below to find and compare flights from Colorado to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Wed 9/16
6:20 am-12:20 pm
1 stop7h 00m
Spokane
Wed 9/23
11:10 am-5:49 pm
1 stop5h 39m
$257
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 9/3
5:35 am-12:14 pm
1 stop6h 39m
Boise Air Term. Gowen Fld
Tue 9/8
11:35 am-3:11 pm
1 stop3h 36m
$263
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Wed 7/15
5:40 am-9:29 am
1 stop3h 49m
Boise Air Term. Gowen Fld
Tue 7/21
6:42 pm-10:01 pm
1 stop3h 19m
$265
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Wed 8/5
6:28 pm-10:32 pm
1 stop4h 04m
Idaho Falls Fanning Field
Sat 8/8
6:00 am-9:14 am
1 stop3h 14m
$269
Grand JunctionBoise
GJT - BOI
GJTBOI
Grand Junction Regnl
Thu 8/13
6:53 pm-11:59 pm
1 stop5h 06m
Boise Air Term. Gowen Fld
Sat 8/15
5:15 pm-9:56 pm
1 stop4h 41m
$271
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 8/29
1:50 pm-8:55 pm
2 stops7h 05m
Boise Air Term. Gowen Fld
Fri 9/4
3:45 pm-11:10 pm
1 stop7h 25m
$276
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 9/5
6:17 am-2:02 pm
1 stop7h 45m
Boise Air Term. Gowen Fld
Fri 9/11
6:49 pm-12:20 pm
1 stop17h 31m
$277
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 9/24
1:43 pm-8:20 pm
1 stop6h 37m
Boise Air Term. Gowen Fld
Tue 9/29
7:20 am-7:26 pm
1 stop12h 06m
$277
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Sat 6/27
3:35 pm-5:19 pm
Nonstop1h 44m
Idaho Falls Fanning Field
Sun 6/28
10:35 am-12:28 pm
Nonstop1h 53m
$279
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Wed 9/2
11:38 am-1:38 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
Sun 9/6
6:30 am-8:31 am
Nonstop2h 01m
$281
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Colorado to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Colorado with our price prediction graph.
DEN-GEG
DEN-BOI
DEN-IDA
GJT-GEG
COS-BOI
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 Colorado to Idaho
USCO-USID
DEN-GEG
DEN-BOI
DEN-IDA
GJT-GEG
What is the cheapest month to book a flight from Colorado to Idaho?
Currently, December is the cheapest month in which you can book a flight from Colorado to Idaho (average of $25). Flying from Colorado to Idaho in April is currently the most expensive (average of $114). 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.
What is the cheapest time of day to fly from CO to ID?
Find hourly flight availability from Colorado to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 16, 2026.
It’s typically best to fly out from Colorado to Idaho in the afternoon. Doing so could potentially save you 29% on the flight price compared to flying at noon, which is usually more expensive.
Weekly flight availability from Colorado to Idaho
Explore weekly flight availability from Colorado to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 16, 2026.
The most flights from USCO to USID are scheduled on a Monday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).
How much does it cost to fly round-trip from Colorado to Idaho?
How far ahead should I book a flight from Colorado to Idaho?
To ensure you get the cheapest price possible for a flight from Colorado to Idaho, you should look to book at least 61 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest day to fly from Colorado to Idaho?
Use this chart to determine the cheapest time to fly round-trip from Colorado to Idaho. Price data was last updated on June 13, 2026.
Travelers seeking maximum savings on their Colorado to Idaho flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Idaho
Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated June 16, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Colorado to Idaho by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Colorado to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Colorado 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 Colorado to Idaho by cabin class
Find flights from Colorado to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Colorado and Idaho flights
Browse other Colorado and Idaho flight options. Last updated on June 16, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Idaho
Find the right flight back to Colorado after your stay in Idaho
Colorado to Idaho flights
Consider these flights traveling from Colorado to Idaho.
Top 5 airlines flying from Colorado to Idaho
Discover the top 5 airlines that operate flights from Colorado to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$54 | Average$132 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$339 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$84 | Average$90 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$143 | Average$369 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$177 | Average$359 | FlexibilityNo cancel fee | On-time63% |