$193+ Cheap flights from Colorado to Duluth (DLH)
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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — DLH
Aug 13 — Aug 201
Round-trip
1 adult, Economy
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Find cheap flights from Colorado to Duluth with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Colorado to DuluthExplore the most affordable flight options available from Colorado to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 14, 2026.
Explore the most affordable flight options available from Colorado to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 14, 2026.
This United Airlines deal was found by Cheapflights users on 7/12. 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 8/214:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Fri 8/286:23 pm
DLH
- DEN
1 stop6h 30m
United Airlines
Deal found 7/12![United Airlines logo]()
$298
This United Airlines deal was found by Cheapflights users on 7/12. 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 9/185:30 am
DEN
- DLH
1 stop7h 59m
United Airlines
Sat 9/196:32 pm
DLH
- DEN
1 stop6h 22m
United Airlines
Deal found 7/12![United Airlines logo]()
$304
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Sat 9/122:50 pm
DEN
- DLH
1 stop7h 20m
United Airlines
Sat 9/196:32 pm
DLH
- DEN
1 stop6h 22m
United Airlines
Deal found 7/12![United Airlines logo]()
$305
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:00 am
DEN
- DLH
1 stop4h 01m
Delta
Sat 8/295:15 am
DLH
- DEN
1 stop5h 42m
Delta
Deal found 7/9![Delta logo]()
$312
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Wed 9/167:45 am
DEN
- DLH
1 stop5h 44m
United Airlines
Mon 9/216:27 pm
DLH
- DEN
1 stop6h 26m
United Airlines
Deal found 7/13![United Airlines logo]()
$333
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Fri 8/144:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Tue 8/186:23 pm
DLH
- DEN
1 stop6h 31m
United Airlines
Deal found 7/13![United Airlines logo]()
$338
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:45 pm
DEN
- DLH
1 stop3h 50m
Delta
Wed 10/74:21 pm
DLH
- DEN
1 stop4h 20m
Delta
Deal found 7/9![Delta logo]()
$340
This United Airlines deal was found by Cheapflights users on 7/12. 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 8/144:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Mon 8/176:23 pm
DLH
- DEN
1 stop6h 31m
United Airlines
Deal found 7/12![United Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/128:45 am
DEN
- DLH
1 stop5h 44m
Delta
Tue 9/158:10 am
DLH
- DEN
1 stop4h 58m
Delta
Deal found 7/10![Delta logo]()
$370
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 am
DEN
- DLH
1 stop7h 29m
United Airlines
Mon 9/146:27 pm
DLH
- DEN
1 stop6h 26m
United Airlines
Deal found 7/10![United Airlines logo]()
$378
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/31:15 pm
COS
- DLH
2 stops8h 49m
United Airlines
Sat 11/73:14 pm
DLH
- COS
2 stops9h 45m
United Airlines
Deal found 7/8![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 9/305:45 pm
DEN
- DLH
1 stop3h 50m
Delta
Thu 10/84:21 pm
DLH
- DEN
1 stop4h 20m
Delta
Deal found 7/10![Delta logo]()
$400
Best flights from Colorado to DuluthDiscover carefully curated flight deals from Colorado to Duluth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 14, 2026.
Discover carefully curated flight deals from Colorado to Duluth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 14, 2026.
This United Airlines deal was found by Cheapflights users on 7/11. 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 8/293:50 pm
DEN
- DLH
1 stop6h 32m
United Airlines
Mon 8/316:23 pm
DLH
- DEN
1 stop6h 30m
United Airlines
Deal found 7/11![United Airlines logo]()
$298
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 9/36:00 am
DEN
- DLH
1 stop4h 01m
Delta
Mon 9/75:15 am
DLH
- DEN
1 stop5h 44m
Delta
Deal found 7/10![Delta logo]()
$486
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Fri 8/144:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Tue 8/186:23 pm
DLH
- DEN
1 stop6h 31m
United Airlines
Deal found 7/13![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Fri 8/144:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Mon 8/176:23 pm
DLH
- DEN
1 stop6h 31m
United Airlines
Deal found 7/14![United Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 7/13. 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.
Mon 8/36:00 am
DEN
- DLH
1 stop4h 01m
Delta
Sat 8/85:15 am
DLH
- DEN
1 stop15h 36m
Delta
Deal found 7/13![Delta logo]()
$491
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Tue 10/278:34 pm
DEN
- DLH
1 stop13h 10m
United Airlines
Sat 10/317:35 am
DLH
- DEN
1 stop5h 49m
United Airlines
Deal found 7/13![United Airlines logo]()
$480
This United Airlines deal was found by Cheapflights users on 7/12. 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 8/213:50 pm
DEN
- DLH
1 stop6h 32m
United Airlines
Mon 8/246:23 pm
DLH
- DEN
2 stops19h 21m
United Airlines
Deal found 7/12![United Airlines logo]()
$482
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 9/129:37 am
DEN
- DLH
2 stops12h 33m
United Airlines
Tue 9/156:27 pm
DLH
- DEN
1 stop6h 27m
United Airlines
Deal found 7/10![United Airlines logo]()
$491
This United Airlines deal was found by Cheapflights users on 7/12. 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 9/185:30 am
DEN
- DLH
1 stop7h 59m
United Airlines
Sun 9/206:27 pm
DLH
- DEN
1 stop6h 26m
United Airlines
Deal found 7/12![United Airlines logo]()
$518
This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:00 am
DEN
- DLH
1 stop16h 23m
United Airlines
Mon 8/176:23 pm
DLH
- DEN
1 stop6h 31m
United Airlines
Deal found 7/9![United Airlines logo]()
$525
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:50 am
DEN
- DLH
2 stops12h 20m
United Airlines
Tue 9/296:00 am
DLH
- DEN
2 stops13h 14m
United Airlines
Deal found 7/10![United Airlines logo]()
$588
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Tue 7/281:30 pm
COS
- DLH
2 stops8h 53m
United Airlines
Sat 8/17:03 am
DLH
- COS
1 stop15h 52m
United Airlines
Deal found 7/13![United Airlines logo]()
$725
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/76:32 pm
COS
- DLH
2 stops27h 51m
United Airlines
Fri 8/146:23 pm
DLH
- COS
1 stop17h 10m
United Airlines
Deal found 7/10![United Airlines logo]()
$729
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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.
Mon 10/511:57 am
COS
- DLH
1 stop10h 25m
United Airlines
Sun 10/113:10 pm
DLH
- COS
1 stop20h 45m
United Airlines
Deal found 7/10![United Airlines logo]()
$798
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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.
Sun 9/2011:55 am
COS
- DLH
1 stop10h 15m
United Airlines
Sun 9/277:45 am
DLH
- COS
1 stop28h 10m
United Airlines
Deal found 7/10![United Airlines logo]()
$844
Last-minute flights from Colorado to DuluthDiscover last-minute flight deals from Colorado to Duluth. Data last updated July 14, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Duluth. Data last updated July 14, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1411:08 am
DEN
- DLH
1 stop3h 34m
Delta
Sat 7/188:00 am
DLH
- DEN
1 stop5h 05m
Delta
Deal found 7/12![Delta logo]()
$448
This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/168:00 am
DEN
- DLH
1 stop8h 34m
United Airlines
Mon 7/206:25 pm
DLH
- DEN
1 stop6h 23m
United Airlines
Deal found 7/9![United Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 7/13. 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.
Mon 8/36:00 am
DEN
- DLH
1 stop4h 01m
Delta
Sat 8/85:15 am
DLH
- DEN
1 stop15h 36m
Delta
Deal found 7/13![Delta logo]()
$491
This United Airlines deal was found by Cheapflights users on 7/12. 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 8/124:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Fri 8/146:23 pm
DLH
- DEN
1 stop6h 30m
United Airlines
Deal found 7/12![United Airlines logo]()
$468
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Fri 8/144:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Tue 8/186:23 pm
DLH
- DEN
1 stop6h 31m
United Airlines
Deal found 7/13![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 7/12. 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 8/144:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Mon 8/176:23 pm
DLH
- DEN
1 stop6h 31m
United Airlines
Deal found 7/12![United Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 7/12. 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 8/214:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Fri 8/286:23 pm
DLH
- DEN
1 stop6h 30m
United Airlines
Deal found 7/12![United Airlines logo]()
$298
This United Airlines deal was found by Cheapflights users on 7/12. 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 8/213:50 pm
DEN
- DLH
1 stop6h 32m
United Airlines
Mon 8/246:23 pm
DLH
- DEN
2 stops19h 21m
United Airlines
Deal found 7/12![United Airlines logo]()
$482
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Mon 8/244:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Sun 8/306:23 pm
DLH
- DEN
1 stop6h 30m
United Airlines
Deal found 7/12![United Airlines logo]()
$452
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 8/254:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Sun 8/306:23 pm
DLH
- DEN
1 stop19h 22m
United Airlines
Deal found 7/12![United Airlines logo]()
$480
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:00 am
DEN
- DLH
1 stop4h 01m
Delta
Sat 8/295:15 am
DLH
- DEN
1 stop5h 42m
Delta
Deal found 7/9![Delta logo]()
$312
This United Airlines deal was found by Cheapflights users on 7/11. 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 8/299:50 am
DEN
- DLH
2 stops12h 32m
United Airlines
Mon 8/316:23 pm
DLH
- DEN
1 stop6h 30m
United Airlines
Deal found 7/11![United Airlines logo]()
$494
One-way flights from Colorado to DuluthSearch for one-way flight options from Colorado to Duluth. Find affordable one-way fares based on user searches. Data last updated July 14, 2026.
Search for one-way flight options from Colorado to Duluth. Find affordable one-way fares based on user searches. Data last updated July 14, 2026.
This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:47 pm
DEN
- DLH
1 stop6h 35m
United Airlines
Deal found 7/9![United Airlines logo]()
$193
This Delta deal was found by Cheapflights users on 7/13. 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.
Tue 8/116:00 am
DEN
- DLH
1 stop4h 01m
Delta
Deal found 7/13![Delta logo]()
$195
This United Airlines deal was found by Cheapflights users on 7/12. 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 9/44:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Deal found 7/12![United Airlines logo]()
$202
This Delta deal was found by Cheapflights users on 7/11. 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 8/26:00 am
DEN
- DLH
1 stop4h 04m
Delta
Deal found 7/11![Delta logo]()
$210
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:00 am
DEN
- DLH
1 stop4h 01m
Delta
Deal found 7/9![Delta logo]()
$214
This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:59 pm
DEN
- DLH
1 stop5h 24m
United Airlines
Deal found 7/9![United Airlines logo]()
$216
This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/214:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Deal found 7/9![United Airlines logo]()
$234
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Mon 9/74:40 pm
DEN
- DLH
1 stop5h 42m
United Airlines
Deal found 7/13![United Airlines logo]()
$241
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Wed 8/54:59 pm
DEN
- DLH
1 stop5h 24m
United Airlines
Deal found 7/13![United Airlines logo]()
$276
Find flight deals from Colorado to Duluth
Keep the following information in mind while searching for Colorado to Duluth flight deals. Data was last updated July 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $298 (United Airlines) |
One-way from | $193 (United Airlines) |
Popular in | August |
Cheapest in | December |
Average price | $463 |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado to Duluth 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 14, 2026.
Use the filters below to find and compare flights from Colorado to Duluth that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Sat 8/29
3:50 pm-11:22 pm
1 stop6h 32m
Duluth Intl
Mon 8/31
6:23 pm-11:53 pm
1 stop6h 30m
$298
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Fri 8/14
4:40 pm-11:22 pm
1 stop5h 42m
Duluth Intl
Tue 8/18
6:23 pm-11:54 pm
1 stop6h 31m
$338
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Fri 8/14
4:40 pm-11:22 pm
1 stop5h 42m
Duluth Intl
Mon 8/17
6:23 pm-11:54 pm
1 stop6h 31m
$366
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Tue 10/27
8:34 pm-10:44 am
1 stop13h 10m
Duluth Intl
Sat 10/31
7:35 am-12:24 pm
1 stop5h 49m
$480
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Fri 8/21
3:50 pm-11:22 pm
1 stop6h 32m
Duluth Intl
Mon 8/24
6:23 pm-12:44 pm
2 stops19h 21m
$482
Quickest round-trip
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Thu 9/3
6:00 am-11:01 am
1 stop4h 01m
Duluth Intl
Mon 9/7
5:15 am-9:59 am
1 stop5h 44m
$486
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Mon 8/3
6:00 am-11:01 am
1 stop4h 01m
Duluth Intl
Sat 8/8
5:15 am-7:51 pm
1 stop15h 36m
$491
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Sat 9/12
9:37 am-11:10 pm
2 stops12h 33m
Duluth Intl
Tue 9/15
6:27 pm-11:54 pm
1 stop6h 27m
$491
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Fri 9/18
5:30 am-2:29 pm
1 stop7h 59m
Duluth Intl
Sun 9/20
6:27 pm-11:53 pm
1 stop6h 26m
$518
DenverDuluth
DEN - DLH
DENDLH
Denver Intl
Sun 8/9
6:00 am-11:23 pm
1 stop16h 23m
Duluth Intl
Mon 8/17
6:23 pm-11:54 pm
1 stop6h 31m
$525
Showing 1-10 of 22 resultsSorted by cheapest first
Best time to book a flight from Colorado to Duluth
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DEN-DLH
COS-DLH
Estimated round-trip price
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Everything you need to know about your flight from Colorado to Duluth
USCO-DLH
DEN-DLH
COS-DLH
How much does it cost to fly round-trip from Colorado to Duluth?
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Alternative routes for Colorado to Duluth
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Complete your trip
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Other flights to Duluth
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Colorado and Duluth flights
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Top 3 airlines flying from Colorado to Duluth
Discover the top 3 airlines that operate flights from Colorado to Duluth. 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 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$68 | Average$256 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$173 | Average$477 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$218 | Average$571 | FlexibilityNo cancel fee | On-time69% |