$54+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Aug 28 — Sep 41
Round-trip
1 adult, Economy
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Find cheap flights from Colorado to Idaho with Cheapflights
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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 July 29, 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 July 29, 2026.
This Priceline deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:08 am
DEN
- BOI
1 stop5h 13m
Multiple Airlines
Tue 9/11:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:08 am
DEN
- BOI
1 stop5h 13m
Multiple Airlines
Tue 9/11:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:29 am
DEN
- BOI
Nonstop2h 00m
Multiple Airlines
Wed 9/21:32 pm
BOI
- DEN
1 stop5h 00m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$172
This Frontier deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Sun 8/2312:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 7/28![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:30 pm
DEN
- BOI
1 stop16h 27m
Frontier
Mon 10/193:52 pm
BOI
- DEN
1 stop12h 00m
Frontier
Deal found 7/26![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:23 am
DEN
- BOI
1 stop8h 34m
Frontier
Mon 10/193:52 pm
BOI
- DEN
1 stop12h 00m
Frontier
Deal found 7/26![Frontier logo]()
$178
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Thu 9/312:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 7/26![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:30 am
DEN
- BOI
1 stop6h 25m
Frontier
Mon 9/282:50 pm
BOI
- DEN
1 stop8h 54m
Frontier
Deal found 7/27![Frontier logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:30 am
DEN
- BOI
1 stop6h 25m
Frontier
Mon 9/212:50 pm
BOI
- DEN
1 stop21h 56m
Frontier
Deal found 7/26![Frontier logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1310:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Sun 8/161:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 7/24![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:08 am
DEN
- BOI
1 stop5h 13m
Multiple Airlines
Thu 9/312:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:23 am
DEN
- BOI
1 stop8h 34m
Frontier
Fri 10/233:52 pm
BOI
- DEN
1 stop12h 00m
Frontier
Deal found 7/26![Frontier logo]()
$194
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 July 29, 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 July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/38:40 pm
DEN
- BOI
Nonstop2h 00m
Southwest
Tue 9/86:25 am
BOI
- DEN
2 stops7h 35m
Southwest
Deal found 7/28![Southwest logo]()
$212
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/263:00 pm
DEN
- BOI
1 stop5h 33m
Alaska Airlines
Fri 8/284:28 pm
BOI
- DEN
1 stop5h 18m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$252
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/68:00 am
DEN
- IDA
Nonstop1h 53m
United Airlines
Mon 11/95:40 pm
IDA
- DEN
Nonstop1h 50m
United Airlines
Deal found 7/27![United Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:06 pm
DEN
- IDA
1 stop4h 16m
Delta
Tue 9/156:00 am
IDA
- DEN
1 stop3h 51m
Delta
Deal found 7/26![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/192:00 pm
DEN
- BOI
2 stops8h 25m
Southwest
Tue 8/252:20 pm
BOI
- DEN
2 stops7h 00m
Southwest
Deal found 7/27![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:05 am
DEN
- IDA
Nonstop1h 46m
United Airlines
Mon 8/244:04 pm
IDA
- DEN
Nonstop1h 54m
United Airlines
Deal found 7/27![United Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:00 pm
DEN
- IDA
1 stop5h 17m
Delta
Wed 9/301:05 pm
IDA
- DEN
1 stop3h 57m
Delta
Deal found 7/26![Delta logo]()
$279
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:24 am
DEN
- WYS
Nonstop1h 56m
United Airlines
Fri 9/186:00 pm
WYS
- DEN
Nonstop1h 45m
United Airlines
Deal found 7/25![United Airlines logo]()
$263
This Alaska Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:43 pm
DEN
- BOI
2 stops9h 02m
Alaska Airlines
Sat 9/191:31 pm
BOI
- DEN
1 stop5h 01m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$290
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:30 pm
DEN
- BOI
1 stop6h 25m
Southwest
Tue 9/16:25 am
BOI
- DEN
2 stops7h 35m
Southwest
Deal found 7/28![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:28 pm
DEN
- IDA
1 stop4h 04m
Delta
Sat 8/296:00 am
IDA
- DEN
1 stop5h 47m
Delta
Deal found 7/26![Delta logo]()
$279
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:25 am
DEN
- WYS
Nonstop1h 56m
United Airlines
Mon 8/171:55 pm
WYS
- DEN
Nonstop1h 45m
United Airlines
Deal found 7/28![United Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:05 pm
DEN
- BOI
2 stops9h 10m
Southwest
Fri 8/289:05 am
BOI
- DEN
1 stop8h 05m
Southwest
Deal found 7/24![Southwest logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:32 am
DEN
- GEG
1 stop12h 35m
Alaska Airlines
Wed 8/191:27 pm
GEG
- DEN
1 stop8h 49m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$317
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:34 am
DEN
- WYS
Nonstop1h 56m
United Airlines
Sun 10/42:05 pm
WYS
- DEN
Nonstop1h 45m
United Airlines
Deal found 7/28![United Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:20 am
DEN
- BOI
2 stops7h 50m
Southwest
Mon 9/73:55 pm
BOI
- DEN
1 stop7h 50m
Southwest
Deal found 7/26![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:05 am
DEN
- IDA
1 stop3h 45m
Delta
Sat 8/156:00 am
IDA
- DEN
1 stop3h 14m
Delta
Deal found 7/28![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:40 am
DEN
- BOI
Nonstop1h 54m
United Airlines
Sat 9/192:41 pm
BOI
- DEN
Nonstop2h 01m
United Airlines
Deal found 7/27![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:53 pm
GJT
- GEG
1 stop6h 00m
Delta
Tue 8/255:00 pm
GEG
- GJT
1 stop3h 56m
Delta
Deal found 7/27![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:40 am
DEN
- BOI
Nonstop1h 55m
United Airlines
Mon 8/312:44 pm
BOI
- DEN
Nonstop2h 01m
United Airlines
Deal found 7/29![United Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/142:15 pm
COS
- BOI
1 stop6h 30m
Southwest
Mon 9/214:55 pm
BOI
- COS
1 stop5h 00m
Southwest
Deal found 7/27![Southwest logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:41 pm
DEN
- GEG
1 stop5h 44m
Alaska Airlines
Mon 9/212:02 pm
GEG
- DEN
2 stops21h 18m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$385
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:53 pm
GJT
- GEG
1 stop5h 33m
Delta
Wed 9/25:00 pm
GEG
- GJT
1 stop3h 56m
Delta
Deal found 7/29![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/261:15 pm
DEN
- GEG
Nonstop2h 20m
Southwest
Wed 9/306:15 am
GEG
- DEN
2 stops8h 45m
Southwest
Deal found 7/25![Southwest logo]()
$312
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:05 am
DEN
- IDA
Nonstop1h 46m
United Airlines
Sat 8/154:04 pm
IDA
- DEN
Nonstop1h 54m
United Airlines
Deal found 7/28![United Airlines logo]()
$289
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:08 am
DEN
- GEG
1 stop4h 44m
Alaska Airlines
Fri 8/282:02 pm
GEG
- DEN
2 stops28h 24m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$386
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:30 pm
DEN
- GEG
Nonstop2h 30m
Southwest
Tue 9/296:15 am
GEG
- DEN
2 stops8h 45m
Southwest
Deal found 7/25![Southwest logo]()
$312
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:32 pm
DEN
- BOI
Nonstop2h 08m
United Airlines
Mon 8/175:44 pm
BOI
- DEN
Nonstop2h 01m
United Airlines
Deal found 7/26![United Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/191:15 pm
COS
- BOI
2 stops9h 10m
Southwest
Thu 8/2010:25 am
BOI
- COS
1 stop7h 40m
Southwest
Deal found 7/27![Southwest logo]()
$314
This Delta deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:41 am
GJT
- GEG
2 stops8h 55m
Delta
Sat 8/225:00 pm
GEG
- GJT
1 stop3h 56m
Delta
Deal found 7/27![Delta logo]()
$384
Last-minute flights from Colorado to IdahoDiscover last-minute flight deals from Colorado to Idaho. Data last updated July 29, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Idaho. Data last updated July 29, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1310:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Sun 8/161:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 7/24![Frontier logo]()
$186
This Expedia deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:29 am
DEN
- BOI
Nonstop2h 00m
Multiple Airlines
Fri 8/281:32 pm
BOI
- DEN
1 stop5h 00m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$198
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:15 pm
DEN
- BOI
Nonstop1h 55m
Southwest
Thu 8/202:55 pm
BOI
- DEN
Nonstop1h 50m
Southwest
Deal found 7/28![Southwest logo]()
$197
This Frontier deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Sun 8/2312:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 7/28![Frontier logo]()
$173
This Priceline deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:29 am
DEN
- BOI
Nonstop2h 00m
Multiple Airlines
Sat 8/221:32 pm
BOI
- DEN
1 stop5h 00m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:49 pm
DEN
- IDA
1 stop11h 58m
Multiple Airlines
Mon 8/245:33 pm
IDA
- DEN
1 stop6h 37m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:08 am
DEN
- BOI
1 stop5h 13m
Multiple Airlines
Tue 9/11:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:08 am
DEN
- BOI
1 stop5h 13m
Multiple Airlines
Thu 9/312:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$187
This Priceline deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:08 am
DEN
- BOI
1 stop5h 13m
Multiple Airlines
Tue 9/11:24 pm
BOI
- DEN
Nonstop2h 06m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:29 am
DEN
- BOI
Nonstop2h 00m
Multiple Airlines
Wed 9/21:32 pm
BOI
- DEN
1 stop5h 00m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$172
This Priceline deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:29 am
DEN
- BOI
Nonstop2h 00m
Multiple Airlines
Tue 9/16:00 am
BOI
- DEN
1 stop5h 07m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$203
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Thu 9/312:24 pm
BOI
- DEN
Nonstop2h 06m
Frontier
Deal found 7/26![Frontier logo]()
$182
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 July 29, 2026.
Search for one-way flight options from Colorado to Idaho. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Deal found 7/26![Frontier logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:19 am
DEN
- BOI
Nonstop2h 09m
Frontier
Deal found 7/24![Frontier logo]()
$66
This Frontier deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:55 am
DEN
- BOI
Nonstop2h 09m
Frontier
Deal found 7/24![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:23 am
DEN
- BOI
1 stop8h 34m
Frontier
Deal found 7/27![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:30 am
DEN
- BOI
1 stop6h 25m
Frontier
Deal found 7/26![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:30 am
DEN
- BOI
1 stop6h 25m
Frontier
Deal found 7/24![Frontier logo]()
$95
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:32 pm
DEN
- BOI
Nonstop2h 08m
United Airlines
Deal found 7/27![United Airlines logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:38 pm
DEN
- BOI
1 stop20h 19m
Frontier
Deal found 7/25![Frontier logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:30 pm
DEN
- GEG
1 stop21h 08m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:30 am
DEN
- BOI
1 stop6h 25m
Frontier
Deal found 7/25![Frontier logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:50 pm
DEN
- GEG
1 stop17h 44m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$107
This Frontier deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:29 am
DEN
- BOI
Nonstop2h 00m
Frontier
Deal found 7/28![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 July 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $168 (Priceline) |
One-way from | $54 (Frontier) |
Popular in | July |
Cheapest in | February |
Average price | $329 |
Good round-trip deal | $218 or less |
Good one-way deal | $162 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 July 29, 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
Thu 9/3
8:40 pm-10:40 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
Tue 9/8
6:25 am-2:00 pm
2 stops7h 35m
$212
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Wed 8/19
2:00 pm-10:25 pm
2 stops8h 25m
Boise Air Term. Gowen Fld
Tue 8/25
2:20 pm-9:20 pm
2 stops7h 00m
$227
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Wed 8/26
3:00 pm-8:33 pm
1 stop5h 33m
Boise Air Term. Gowen Fld
Fri 8/28
4:28 pm-9:46 pm
1 stop5h 18m
$252
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Fri 11/6
8:00 am-9:53 am
Nonstop1h 53m
Idaho Falls Fanning Field
Mon 11/9
5:40 pm-7:30 pm
Nonstop1h 50m
$259
Quickest round-trip
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Thu 8/20
8:05 am-9:51 am
Nonstop1h 46m
Idaho Falls Fanning Field
Mon 8/24
4:04 pm-5:58 pm
Nonstop1h 54m
$259
DenverWest Yellowstone
DEN - WYS
DENWYS
Denver Intl
Fri 9/11
11:24 am-1:20 pm
Nonstop1h 56m
West Yellowstone
Fri 9/18
6:00 pm-7:45 pm
Nonstop1h 45m
$263
DenverWest Yellowstone
DEN - WYS
DENWYS
Denver Intl
Thu 8/13
11:25 am-1:21 pm
Nonstop1h 56m
West Yellowstone
Mon 8/17
1:55 pm-3:40 pm
Nonstop1h 45m
$263
DenverWest Yellowstone
DEN - WYS
DENWYS
Denver Intl
Fri 10/2
11:34 am-1:30 pm
Nonstop1h 56m
West Yellowstone
Sun 10/4
2:05 pm-3:50 pm
Nonstop1h 45m
$263
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Fri 8/28
5:30 pm-11:55 pm
1 stop6h 25m
Boise Air Term. Gowen Fld
Tue 9/1
6:25 am-2:00 pm
2 stops7h 35m
$277
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Tue 8/18
1:05 pm-10:15 pm
2 stops9h 10m
Boise Air Term. Gowen Fld
Fri 8/28
9:05 am-5:10 pm
1 stop8h 05m
$277
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
MTJ-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-BOI
DEN-GEG
DEN-IDA
MTJ-GEG
What is the cheapest month to book a flight from Colorado to Idaho?
Currently, January is the cheapest month in which you can book a flight from Colorado to Idaho (average of $214). Flying from Colorado to Idaho in June is currently the most expensive (average of $358). 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 July 29, 2026.
It’s typically best to fly out from Colorado to Idaho in the afternoon. Doing so could potentially save you 17% 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 July 29, 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 (10 on average).
How much does it cost to fly round-trip from Colorado to Idaho?
Airfare is below average for this route at the moment.
Colorado to Idaho flights typically cost between $169 and $359 in August.The cheapest round-trip price found within the last 5 days was $168 on Multiple Airlines (Aug 25-Sep 1).
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 80 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 July 25, 2026.
Travelers seeking maximum savings on their Colorado to Idaho flight should consider departing on Thursday mornings when fares are most often at their lowest. Thursday at noon 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 July 29, 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
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
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 July 29, 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 4 airlines flying from Colorado to Idaho
Discover the top 4 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 July 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$54 | Average$128 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$294 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$177 | Average$389 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$364 | FlexibilityNo cancel fee | On-time63% |