$40 Find Cheap Flights from Colorado to the United States

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Low seasonJanuary
High seasonMay
Cheapest flight$40
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Denver to Las Vegas

Flights from Colorado to the United States: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Colorado to the United States 
JustinFlew with FrontierDEN-ONTMar 2025
Bring your credit card - lots of fun places to eat at the airport
JánosFlew with United AirlinesDEN-HNLApr 2025
Enough legroom, but very uncomfortable seats that does not recline well and also the light switch kept turning on by my neighbours.
PaulFlew with American AirlinesDEN-PHLJan 2025
Contour airlines was great for a connection through Philadelphia. I had a tight connection and thought I might not make it, but I called and was able to talk with an actual person. They called ahead to the gate, and the plane held the door open a few minutes for me. Great service, and a very comfortable flight.
BrittanyFlew with United AirlinesDEN-RSWDec 2024
United was comfortable and new, and offers direct flights from DEN to RSW. Frontier makes the same trip, but is so much less comfy, with less space, no carryon included, and no complimentary snacks/drink, or seat back TVs. Frontier pales in comparison to United.
Verified travelerFlew with Alaska AirlinesDEN-SEAOct 2024
Go early, it’s a big airport. There are two TSA screening areas, one might be more crowded than the other. From checking it to the gate give yourself at least 20-30 minutes to get there.
Verified travelerFlew with Qantas AirwaysDEN-LAXSep 2024
You don’t have to arrive two hours early since it is a domestic flight
JasonFlew with United AirlinesDEN-IADNov 2024
DIA is a large airport. Get there early.
Verified travelerFlew with LufthansaDEN-COSNov 2024
Please be aware it is a short trip and there’s no time for refreshments, and there was no screen to watch a movie.
AdamFlew with SouthwestDEN-ORDOct 2024
Arriving T5 at ORD on Southwest is often a LONG walk, with no moving walkways going out, to baggage claim / pickup.
ChristineFlew with SouthwestDEN-LGBAug 2024
I always fly Southwest. I actually don’t mind they are moving to Assigned seating. Easy boarding. On time. Smooth landing. Long Beach is small airport and easy to Navigate.
kristenFlew with United AirlinesDEN-MCOJul 2024
allow plenty of time for your connection, if you're connecting somewhere, bc. its a very LARGE airport and your connection is likely a long trek....
F.Flew with United AirlinesDEN-PSCAug 2024
Check airline delay flight rate and choose another airline if you have important commitments to avoid frustration and missing important meetings.
JamesFlew with United AirlinesDEN-TPAAug 2024
The non-stop was great. This relieved much stress due to the delayed flight.
kristenFlew with United AirlinesASE-DENJul 2024
weather can cause delays, and pack light if you chose to carry-on
Mike & DebbieFlew with SouthwestDEN-SDFAug 2024
Denver is a huge airport. Be prepared to walk plenty.
Verified travelerFlew with FrontierDEN-LASJul 2024
Stay away from Frontier and go with United or Southwest. Any money you might save with Frontier is wasted when the flights are always delayed.
MichaelFlew with United AirlinesDEN-INDMar 2024
Eat before you get on the plane. Arrive at the gate early if you have carry-on luggage.
Verified travelerFlew with Air CanadaDEN-COSMar 2024
Make sure if you need a wheelchair you have plenty of time to between connecting flights.
Verified travelerFlew with Air CanadaCOS-DENMar 2024
Make sure to have snacks and drinks with you if you need them.
AndrewFlew with United AirlinesDEN-LAXApr 2024
New DIA security for 2024 is much better
ColleenFlew with SouthwestDEN-SATMar 2024
We went to San Antonio because we didn't get a direct flight to Ft Lauderdale. I kinda wish we had more time there.
Verified travelerFlew with FrontierDEN-PHLMay 2024
Don’t fly frontier. The staff at the airport is rude, be careful.
BindulFlew with United AirlinesDEN-IADFeb 2024
There are multiple flights between DEN and IAD everyday, including some wide bodies. Try and get on one of the wide bodies whenever possible.
ChristineFlew with American AirlinesASE-ORDDec 2023
It’s a small airport so you’re only getting commuter jets. But it’s very nice.
BrianFlew with United AirlinesDEN-ORDJan 2024
Big airport. Make sure you have enough time between flights for rest, eating, etc…
StanleyFlew with Air CanadaDEN-TULJan 2024
Great all around airline ,good people On my flight entertainment system unusable
RalphFlew with SouthwestDEN-PSPFeb 2024
If you really want a better seat make sure you upgrade.
RebeccaFlew with United AirlinesDEN-MSOFeb 2024
Big comfortable chairs that you can sleep on the B concourse.
Verified travelerFlew with Alaska AirlinesDEN-SEAFeb 2024
Fly with Alaska and you’ll be pleased at their friendly competence.
GoldenFlew with United AirlinesDEN-TPAFeb 2024
Fly first class if you are 6ft or taller

FAQs for booking flights from Colorado to the United States

  • How does KAYAK find such low prices on flights from Colorado to the United States?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Colorado to the United States.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Colorado to the United States?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Colorado to the United States is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Colorado to the United States?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Colorado to the United States with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Colorado to the United States?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Colorado to the United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in the United States?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in the United States is Las Vegas Harry Reid Intl Airport (LAS), with an average flight price of $134.

  • What is the cheapest day to fly to the United States?

    Based on KAYAK data, the cheapest day to fly to the United States is Thursday where round-trip tickets can be as cheap as $349. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $502 on average.

  • What is the cheapest time of day to fly to the United States?

    The cheapest time of day to fly to the United States is generally in the evening, when round-trip flights cost $253 on average. Morning departures are around 57% more expensive than evening flights, on average. The most expensive time of day to fly to the United States is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $644.

  • What is the cheapest flight to the United States?

    The cheapest ticket to the United States from Colorado found in the last 72 hours was to Los Angeles, at $34 round-trip. The most popular route is Aspen (ASE) to Denver (DEN) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $255.

  • What is the cheapest month to fly from Colorado to the United States?

    The cheapest month for flights from Colorado to the United States is April, when tickets cost $325 (return) on average. On the other hand, the most expensive months are June and November, when the average cost of round-trip tickets is $612 and $490 respectively.

  • How far in advance should I book a flight from Colorado to the United States?

    To get a below average price on the flight from Colorado to the United States, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

  • How long is the flight to the United States?

    An average nonstop flight from Colorado to the United States takes 3h 11m, covering a distance of 1345 miles. The shortest route is Denver (DEN) to Kansas City (MCI) with an average flight time of 1h 35m.

  • What are the most popular destinations in the United States?

    Based on KAYAK flight searches, the most popular destination is New York (12% of total searches to the United States). The next most popular destinations are Seattle (6%) and Las Vegas (6%). Searches for flights to Houston (4%), to Chicago (4%) and to Washington, D.C. (4%) are also popular.

Top 5 airlines serving from Colorado to the United States

Need help choosing which airline to fly with from Colorado to the United States? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.7
Denver Air ConnectionOverall score based on 8 reviews
8.7Food
9.2Comfort
9.7Crew
8.7Boarding
8.7Entertainment
Airline reviews

The connecting flight came in 45 min late but everything else was great

8.0 ExcellentR, Jun 2024DEN - CVN
Read more Denver Air Connection reviews

The connecting flight came in 45 min late but everything else was great

Absolutely easy travels and no cost cutting by the airline.

Their snacks and hospitality was amazing. They offered full sized snacks. Im talking full sized water bottles, full sized snickers bars, gold fish, full sized canned sodas, what ever you wanted they took care of it for FREE. The crew was really nice and hospitable. I was honestly shocked

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

The seats were a bit cramped and worn, but otherwise okay.

I would have liked to arrive on time - not 5 hours late!

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

It was a perfect flight in all aspects! Both legs!

Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

Had a hard time finding my assigned seat. No attendants to assist.

The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!

We had a wonderful flight due to the care of our experienced pilot and copilot and the magnificent air views from our comfortable seats. What excitement to be in such a small plane with such magnificent around us.

Multiple time changes, then we left earlier than we were told.

Communication could be better but the staff and crew were over the top friendly and helpful, The flight itself was smooth.

flight was cancelled literally at 10pm the night before an early morning flight with hardly any time to reschedule. Will never book with kayak again.

My flight was cancelled 12 hours before takeoff. I was not able to reschedule another flight to make connections and had to cancel the entire trip. The ticket that was supposed to replace the cancelled flight had no boarding pass and I was unable to get one at the airport so I was denied access to the rescheduled flight. I was refunded but I missed my daughter's birthday.

I had a family emergency and couldn’t make the flight, and they wouldn’t let me cancel/refund it (a *month* ahead of time), were especially difficult with me on the phone, and wouldn’t let me even so much as reschedule the flight or get credit.

Flight was cancelled, communication was poor and should have canceled flight much earlier.

Flight was cancelled twice. Moved four more times. Probably the least timely and poorly run airline I have ever experienced in my life. I have traveled hundreds of times to dozens of countries and this one takes the cake.

Excellent crew, good flight. Flight was delayed about 1 1/2 hours though.

Pros: "The ground crew and flight crew were great."
Cons: "Would have appreciated easier steps (lower risers) for boarding. Arthritic knee makes it hard for me to manage the high risers between steps. Also having armrests would have made the flight more comfortable."

Everything went as planned. Crew was great. Seats were still not that comfortable.

they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation

The seats were extremely hard and uncomfortable, even for a budget airline.

Boarding was very well executed. Got my bag right away.

Overall experience good. There was no food and seats were not terribly comfortable.

There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr

There were a lot of issues every step of the process. Check in, security, boarding, and dealing with luggage. Plus the money you think you are saving you end up using in hidden fees.

The flight attendant was arguing with a passenger before takeoff. The passenger was frustrated but the flight attendant should have handled it with grace, but instead she was nasty and rude. The seats were comfortable and the flight was uneventful. I wish we didn’t have to pay for drinks or snacks but that’s what you get with a budget airline.

Booked two aisle seats and were switched to an aisle and middle. Not happy.

I fly Frontier often and generally don't have any issues. For some reason, the Denver to Houston's George Bush Intercontinental (IAH) flight always needs to wait on the tarmac in Houston because a gate is not available after landing. I've been stuck for as little as 15 minutes and as much as a little over an hour. I know only fly the Frontier Denver to IAH route when there is not an available flight to Houston Hobby (HOU).

Book cheap flights from Colorado to the United States

Recent round-trip flight deals

6/2
nonstopFrontier
2h 07mDEN-LAS
6/4
nonstopFrontier
2h 04mLAS-DEN
$74
6/1
nonstopFrontier
2h 07mDEN-LAS
6/4
nonstopFrontier
2h 04mLAS-DEN
$76
5/31
nonstop
2h 06mDEN-LAS
6/4
1 stop
6h 39mLAS-DEN
$133
5/31
nonstop
2h 09mDEN-LAS
6/4
1 stop
6h 39mLAS-DEN
$134
5/22
nonstopUnited Airlines
2h 01mDEN-LAS
5/27
nonstopUnited Airlines
1h 59mLAS-DEN
$149
5/24
nonstopSouthwest
2h 35mDEN-ORD
5/25
nonstopSouthwest
2h 45mORD-DEN
$151
5/21
1 stopSouthwest
4h 20mDEN-LAS
5/25
nonstopSouthwest
1h 50mLAS-DEN
$155
6/3
nonstopAmerican Airlines
2h 46mDEN-ORD
6/7
nonstopAmerican Airlines
2h 34mORD-DEN
$160
5/29
nonstopUnited Airlines
2h 35mDEN-ORD
6/5
nonstopUnited Airlines
2h 50mORD-DEN
$169
6/25
nonstopAmerican Airlines
2h 40mDEN-ORD
6/27
nonstopAmerican Airlines
2h 49mORD-DEN
$173

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Recent one-way flight deals

8/4
nonstopFrontier
2h 05mDEN-LAS
$40
8/16
nonstopFrontier
2h 05mDEN-LAS
$44
6/1
1 stop
22h 00mDEN-LAS
$72
5/21
1 stopSouthwest
4h 20mDEN-LAS
$76
5/27
nonstopSouthwest
2h 35mDEN-ORD
$76
6/15
1 stop
27h 02mDEN-LAS
$85
6/11
nonstopUnited Airlines
2h 03mDEN-DFW
$89
7/2
1 stopUnited Airlines
4h 54mDEN-DFW
$91
6/19
1 stopDenver Air Connection
3h 50mDEN-ORD
$162
7/6
1 stopDenver Air Connection
3h 50mDEN-ORD
$163

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Last minute flights from Colorado to the United States

Last minute flight, train and bus deals

5/6
nonstopFrontier
2h 09mDEN-DFW
5/7
nonstopFrontier
2h 30mDFW-DEN
$133
5/5
multi-stopFrontier
7h 33mDEN-LAX
5/21
nonstopFrontier
2h 42mLAX-DEN
$149
5/6
multi-stopDelta
6h 39mDEN-EWR
5/8
multi-stopDelta
7h 04mEWR-DEN
$237
5/6
multi-stopDelta
6h 47mDEN-DFW
5/20
multi-stopDelta
8h 10mDFW-DEN
$259
5/6
nonstopAmerican Airlines
2h 32mDEN-ORD
5/13
nonstopAmerican Airlines
2h 43mORD-DEN
$293
5/6
nonstopSouthwest
2h 35mDEN-ORD
5/13
multi-stopSouthwest
9h 55mORD-DEN
$303
5/6
multi-stopSouthwest
7h 30mDEN-ORD
5/13
nonstopSouthwest
2h 40mORD-DEN
$308
5/3
multi-stopAmerican Airlines
7h 03mDEN-EWR
5/10
multi-stopAmerican Airlines
8h 03mEWR-DEN
$359
5/3
multi-stopUnited Airlines
8h 21mDEN-SEA
5/7
multi-stopUnited Airlines
6h 59mSEA-DEN
$367
5/6
nonstopUnited Airlines
2h 33mDEN-ORD
6/14
nonstopUnited Airlines
2h 43mORD-DEN
$385

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Everything you need to know for your flight to the United States

Cabin class types available on flights to Colorado

Cabin classes available on flights to Colorado. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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