$39+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Apr 17 — Apr 241
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 March 18, 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 March 18, 2026.
This Frontier deal was found by Cheapflights users on 3/15. 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 4/29:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Thu 4/912:03 pm
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/15![Frontier logo]()
$100
This Frontier deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/99:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Sun 4/1212:03 pm
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/17![Frontier logo]()
$114
This Orbitz deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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.
Thu 5/2810:25 am
DEN
- BOI
Nonstop2h 05m
Frontier
Tue 6/21:25 pm
BOI
- DEN
Nonstop2h 16m
Frontier
Deal found 3/16![Frontier logo]()
$123
This Expedia deal was found by Cheapflights users on 3/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1210:22 am
DEN
- BOI
Nonstop2h 05m
Frontier
Thu 5/141:22 pm
BOI
- DEN
Nonstop2h 16m
Frontier
Deal found 3/13![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 3/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Sun 4/1911:53 am
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/13![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 5/2110:25 am
DEN
- BOI
Nonstop2h 05m
Frontier
Tue 5/261:25 pm
BOI
- DEN
Nonstop2h 16m
Frontier
Deal found 3/13![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/29:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Sun 4/512:03 pm
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/14![Frontier logo]()
$153
This Expedia deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 6/410:25 am
DEN
- BOI
Nonstop2h 05m
Frontier
Sun 6/71:25 pm
BOI
- DEN
Nonstop2h 16m
Frontier
Deal found 3/16![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/169:28 am
DEN
- GEG
Nonstop2h 21m
Frontier
Thu 4/2311:44 am
GEG
- DEN
Nonstop2h 14m
Frontier
Deal found 3/17![Frontier logo]()
$186
This Trip.com deal was found by Cheapflights users on 3/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:12 am
DEN
- GEG
Nonstop2h 26m
Frontier
Wed 5/2712:33 pm
GEG
- DEN
Nonstop2h 26m
Frontier
Deal found 3/13![Frontier logo]()
$187
This Expedia deal was found by Cheapflights users on 3/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1810:12 am
DEN
- GEG
Nonstop2h 26m
Frontier
Wed 5/2712:33 pm
GEG
- DEN
Nonstop2h 26m
Frontier
Deal found 3/12![Frontier logo]()
$193
This Frontier deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/99:00 am
DEN
- GEG
Nonstop2h 21m
Frontier
Thu 4/93:40 pm
GEG
- DEN
1 stop5h 20m
Frontier
Deal found 3/17![Frontier logo]()
$198
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 March 18, 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 March 18, 2026.
This Southwest deal was found by Cheapflights users on 3/12. 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.
Wed 4/81:25 pm
DEN
- BOI
Nonstop2h 00m
Southwest
Wed 4/153:15 pm
BOI
- DEN
Nonstop1h 50m
Southwest
Deal found 3/12![Southwest logo]()
$227
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 5/166:05 am
DEN
- GEG
1 stop5h 07m
Delta
Sun 5/175:00 am
GEG
- DEN
1 stop5h 49m
Delta
Deal found 3/16![Delta logo]()
$245
This United Airlines deal was found by Cheapflights users on 3/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/78:10 am
DEN
- IDA
Nonstop1h 45m
United Airlines
Sun 5/105:26 pm
IDA
- DEN
Nonstop1h 55m
United Airlines
Deal found 3/15![United Airlines logo]()
$249
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:06 pm
DEN
- GEG
1 stop28h 14m
Alaska Airlines
Sun 5/37:27 am
GEG
- DEN
1 stop27h 39m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$273
This United Airlines deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/168:10 am
DEN
- IDA
Nonstop1h 43m
United Airlines
Thu 4/232:30 pm
IDA
- DEN
Nonstop1h 47m
United Airlines
Deal found 3/17![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/141:25 pm
DEN
- BOI
Nonstop2h 00m
Southwest
Tue 4/2110:05 am
BOI
- DEN
Nonstop1h 55m
Southwest
Deal found 3/16![Southwest logo]()
$271
This Delta deal was found by Cheapflights users on 3/15. 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.
Fri 4/35:15 pm
GJT
- BOI
1 stop4h 56m
Delta
Sun 4/510:25 am
BOI
- GJT
1 stop6h 10m
Delta
Deal found 3/15![Delta logo]()
$271
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
Fri 5/86:07 pm
DEN
- BOI
2 stops19h 45m
Alaska Airlines
Sat 5/96:08 pm
BOI
- DEN
1 stop16h 46m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$278
This Delta deal was found by Cheapflights users on 3/15. 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 4/25:15 pm
GJT
- BOI
1 stop4h 56m
Delta
Sat 4/412:45 pm
BOI
- GJT
1 stop5h 48m
Delta
Deal found 3/15![Delta logo]()
$271
This Southwest deal was found by Cheapflights users on 3/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/94:35 pm
DEN
- BOI
1 stop6h 40m
Southwest
Sat 5/162:50 pm
BOI
- DEN
Nonstop1h 50m
Southwest
Deal found 3/14![Southwest logo]()
$281
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/81:16 pm
DEN
- BOI
2 stops9h 36m
Alaska Airlines
Mon 4/136:00 am
BOI
- DEN
1 stop17h 56m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$288
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Thu 5/2811:45 am
DEN
- IDA
Nonstop1h 40m
United Airlines
Mon 6/14:10 pm
IDA
- DEN
Nonstop1h 51m
United Airlines
Deal found 3/12![United Airlines logo]()
$289
This United Airlines deal was found by Cheapflights users on 3/14. 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 4/287:20 pm
DEN
- BOI
Nonstop2h 02m
United Airlines
Tue 5/125:27 pm
BOI
- DEN
Nonstop2h 11m
United Airlines
Deal found 3/14![United Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 3/12. 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.
Fri 5/86:25 pm
DEN
- BOI
1 stop6h 35m
Southwest
Sat 5/92:50 pm
BOI
- DEN
Nonstop1h 50m
Southwest
Deal found 3/12![Southwest logo]()
$294
This Delta deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:19 pm
DEN
- BOI
1 stop5h 45m
Delta
Mon 5/186:41 pm
BOI
- DEN
1 stop3h 59m
Delta
Deal found 3/17![Delta logo]()
$304
This United Airlines deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 6/267:34 pm
DEN
- BOI
Nonstop2h 01m
United Airlines
Tue 6/305:46 pm
BOI
- DEN
Nonstop1h 59m
United Airlines
Deal found 3/17![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 6/49:10 pm
DEN
- BOI
1 stop4h 35m
Southwest
Sun 6/77:50 pm
BOI
- DEN
1 stop5h 50m
Southwest
Deal found 3/16![Southwest logo]()
$304
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/2211:55 am
COS
- BOI
2 stops9h 29m
Delta
Sun 4/266:00 am
BOI
- COS
1 stop5h 12m
Delta
Deal found 3/16![Delta logo]()
$306
This Delta deal was found by Cheapflights users on 3/13. 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.
Wed 4/812:10 pm
COS
- BOI
1 stop5h 08m
Delta
Sat 4/116:00 am
BOI
- COS
1 stop5h 24m
Delta
Deal found 3/13![Delta logo]()
$311
This Southwest deal was found by Cheapflights users on 3/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/92:15 pm
COS
- BOI
1 stop7h 35m
Southwest
Sun 4/123:25 pm
BOI
- COS
1 stop8h 25m
Southwest
Deal found 3/14![Southwest logo]()
$319
This United Airlines deal was found by Cheapflights users on 3/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/52:10 pm
DEN
- WYS
Nonstop1h 52m
United Airlines
Mon 6/82:19 pm
WYS
- DEN
Nonstop1h 41m
United Airlines
Deal found 3/15![United Airlines logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
Fri 5/87:25 pm
DEN
- IDA
1 stop27h 15m
Alaska Airlines
Sun 5/106:00 am
IDA
- DEN
1 stop17h 59m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$398
This Delta deal was found by Cheapflights users on 3/15. 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 4/227:45 pm
DEN
- SUN
2 stops16h 16m
Delta
Tue 5/57:15 am
SUN
- DEN
1 stop4h 17m
Delta
Deal found 3/15![Delta logo]()
$312
This United Airlines deal was found by Cheapflights users on 3/13. 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 4/411:30 am
DEN
- SUN
Nonstop2h 05m
United Airlines
Mon 4/62:24 pm
SUN
- DEN
Nonstop2h 06m
United Airlines
Deal found 3/13![United Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 3/12. 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 5/58:15 pm
DEN
- GEG
Nonstop2h 20m
Southwest
Tue 5/122:40 pm
GEG
- DEN
1 stop7h 40m
Southwest
Deal found 3/12![Southwest logo]()
$329
This United Airlines deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/75:13 pm
COS
- BOI
1 stop4h 09m
United Airlines
Wed 4/86:15 am
BOI
- COS
1 stop6h 21m
United Airlines
Deal found 3/17![United Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 5/212:15 pm
COS
- BOI
1 stop7h 35m
Southwest
Thu 5/288:50 am
BOI
- COS
1 stop10h 35m
Southwest
Deal found 3/16![Southwest logo]()
$340
This Alaska Airlines deal was found by Cheapflights users on 3/15. 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.
Thu 5/77:06 pm
DEN
- IDA
2 stops27h 34m
Alaska Airlines
Sun 5/106:00 am
IDA
- DEN
1 stop17h 59m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$455
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/297:45 am
GJT
- GEG
2 stops8h 04m
Delta
Thu 5/71:30 pm
GEG
- GJT
1 stop3h 46m
Delta
Deal found 3/16![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/226:00 am
COS
- BOI
1 stop3h 54m
United Airlines
Sun 4/265:00 am
BOI
- COS
1 stop3h 49m
United Airlines
Deal found 3/18![United Airlines logo]()
$339
Last-minute flights from Colorado to IdahoDiscover last-minute flight deals from Colorado to Idaho. Data last updated March 18, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Idaho. Data last updated March 18, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/14. 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.
Sun 3/299:10 am
DEN
- BOI
Nonstop2h 10m
Frontier
Thu 4/212:03 pm
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/14![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 3/15. 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 4/29:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Thu 4/912:03 pm
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/15![Frontier logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/29:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Sun 4/512:03 pm
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/14![Frontier logo]()
$153
This Expedia deal was found by Cheapflights users on 3/14. 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 4/77:00 am
DEN
- BOI
1 stop5h 19m
Multiple Airlines
Thu 4/912:03 pm
BOI
- DEN
Nonstop2h 03m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$169
This Frontier deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/99:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Sun 4/1212:03 pm
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/17![Frontier logo]()
$114
This Frontier deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/99:00 am
DEN
- GEG
Nonstop2h 21m
Frontier
Thu 4/93:40 pm
GEG
- DEN
1 stop5h 20m
Frontier
Deal found 3/17![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Sun 4/129:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Sun 4/1911:53 am
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/13![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/169:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Sun 4/1911:53 am
BOI
- DEN
Nonstop2h 03m
Frontier
Deal found 3/15![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:10 am
DEN
- BOI
Nonstop1h 58m
Multiple Airlines
Wed 4/222:57 pm
BOI
- DEN
1 stop6h 52m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/169:28 am
DEN
- GEG
Nonstop2h 21m
Frontier
Thu 4/2311:44 am
GEG
- DEN
Nonstop2h 14m
Frontier
Deal found 3/17![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:10 am
DEN
- BOI
Nonstop1h 58m
Multiple Airlines
Tue 4/216:32 am
BOI
- DEN
1 stop5h 48m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:10 am
DEN
- BOI
Nonstop1h 58m
Multiple Airlines
Sat 4/186:32 am
BOI
- DEN
1 stop5h 48m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$191
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 March 18, 2026.
Search for one-way flight options from Colorado to Idaho. Find affordable one-way fares based on user searches. Data last updated March 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 4/29:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Deal found 3/18![Frontier logo]()
$39
This Frontier deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/169:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Deal found 3/17![Frontier logo]()
$40
This Frontier deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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.
Sun 5/2410:25 am
DEN
- BOI
Nonstop2h 05m
Frontier
Deal found 3/17![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 5/1210:22 am
DEN
- BOI
Nonstop2h 05m
Frontier
Deal found 3/17![Frontier logo]()
$73
This Frontier deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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.
Sun 4/199:10 am
DEN
- BOI
Nonstop1h 58m
Frontier
Deal found 3/17![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1410:22 am
DEN
- BOI
Nonstop2h 05m
Frontier
Deal found 3/14![Frontier logo]()
$83
This Frontier deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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.
Sun 5/1010:22 am
DEN
- BOI
Nonstop2h 05m
Frontier
Deal found 3/18![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/169:28 am
DEN
- GEG
Nonstop2h 21m
Frontier
Deal found 3/17![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 3/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:12 am
DEN
- GEG
Nonstop2h 26m
Frontier
Deal found 3/13![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/29:00 am
DEN
- GEG
Nonstop2h 21m
Frontier
Deal found 3/13![Frontier logo]()
$105
This Trip.com deal was found by Cheapflights users on 3/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1810:12 am
DEN
- GEG
Nonstop2h 26m
Frontier
Deal found 3/13![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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 4/99:00 am
DEN
- GEG
Nonstop2h 21m
Frontier
Deal found 3/17![Frontier logo]()
$108
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 March 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $100 (Frontier) |
One-way from | $39 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $277 |
Good round-trip deal | $118 or less |
Good one-way deal | $146 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 March 18, 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
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Wed 4/8
1:25 pm-3:25 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
Wed 4/15
3:15 pm-5:05 pm
Nonstop1h 50m
$227
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Sat 5/16
6:05 am-10:12 am
1 stop5h 07m
Spokane
Sun 5/17
5:00 am-11:49 am
1 stop5h 49m
$245
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Thu 5/7
8:10 am-9:55 am
Nonstop1h 45m
Idaho Falls Fanning Field
Sun 5/10
5:26 pm-7:21 pm
Nonstop1h 55m
$249
Quickest round-trip
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Thu 4/16
8:10 am-9:53 am
Nonstop1h 43m
Idaho Falls Fanning Field
Thu 4/23
2:30 pm-4:17 pm
Nonstop1h 47m
$249
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Tue 4/14
1:25 pm-3:25 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
Tue 4/21
10:05 am-12:00 pm
Nonstop1h 55m
$271
Grand JunctionBoise
GJT - BOI
GJTBOI
Grand Junction Regnl
Fri 4/3
5:15 pm-10:11 pm
1 stop4h 56m
Boise Air Term. Gowen Fld
Sun 4/5
10:25 am-4:35 pm
1 stop6h 10m
$271
Grand JunctionBoise
GJT - BOI
GJTBOI
Grand Junction Regnl
Thu 4/2
5:15 pm-10:11 pm
1 stop4h 56m
Boise Air Term. Gowen Fld
Sat 4/4
12:45 pm-6:33 pm
1 stop5h 48m
$271
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Tue 4/28
7:06 pm-10:20 pm
1 stop28h 14m
Spokane
Sun 5/3
7:27 am-12:06 pm
1 stop27h 39m
$273
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Fri 5/8
6:07 pm-1:52 pm
2 stops19h 45m
Boise Air Term. Gowen Fld
Sat 5/9
6:08 pm-10:54 am
1 stop16h 46m
$278
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 5/9
4:35 pm-11:15 pm
1 stop6h 40m
Boise Air Term. Gowen Fld
Sat 5/16
2:50 pm-4:40 pm
Nonstop1h 50m
$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-BOI
DEN-GEG
DEN-IDA
COS-BOI
DEN-SUN
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Colorado to Idaho
USCO-USID
DEN-BOI
DEN-GEG
DEN-IDA
COS-BOI
What is the cheapest month to book a flight from Colorado to Idaho?
Currently, May is the cheapest month in which you can book a flight from Colorado to Idaho (average of $43). Flying from Colorado to Idaho in April is currently the most expensive (average of $171). 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 March 18, 2026.
It’s typically best to fly out from Colorado to Idaho in the afternoon. Doing so could potentially save you 36% on the flight price compared to flying in the morning, which is usually more expensive.
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 March 14, 2026.
Travelers seeking maximum savings on their Colorado to Idaho flight should consider departing on Thursday 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.
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 March 18, 2026.
The most flights from USCO to USID are scheduled on a Monday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 on average).
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 March 18, 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.
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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.
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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 March 18, 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 March 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$40 | Average$88 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$54 | Average$125 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$342 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$156 | Average$366 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$197 | Average$351 | FlexibilityNo cancel fee | On-time63% |