$41 Find Cheap Flights from Colorado to the United States

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Low seasonJanuary
Cheapest flight$41
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 10% increase in price.
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 
Verified travelerFlew with United Airlines
DEN
-
RSW
Feb 2026
We flew United Airlines and boarding went smoothly if not a little slow but we left on time. Arrive early at the airport as it gets very busy and crowded especially on the weekends.
NesrinFlew with Southwest
DEN
-
IAD
Feb 2026
Get a seat in the very front if you can, otherwise, it is a very slow process.
Verified travelerFlew with Delta
DEN
-
SEA
Jun 2025
If you are on the left side of the plane you should spot Mt. Rainer on your way into Seattle.
JesseFlew with Air Canada
DEN
-
IND
May 2025
takes times in security check, so come early
Verified travelerFlew with Alaska Airlines
DEN
-
SEA
Oct 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.
AdamFlew with Southwest
DEN
-
ORD
Oct 2024
Arriving T5 at ORD on Southwest is often a LONG walk, with no moving walkways going out, to baggage claim / pickup.
Verified travelerFlew with Qantas Airways
DEN
-
LAX
Sep 2024
You don’t have to arrive two hours early since it is a domestic flight
JasonFlew with United Airlines
DEN
-
IAD
Nov 2024
DIA is a large airport. Get there early.
kristenFlew with United Airlines
DEN
-
MCO
Jul 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 Airlines
DEN
-
PSC
Aug 2024
Check airline delay flight rate and choose another airline if you have important commitments to avoid frustration and missing important meetings.
kristenFlew with United Airlines
ASE
-
DEN
Jul 2024
weather can cause delays, and pack light if you chose to carry-on
Mike & DebbieFlew with Southwest
DEN
-
SDF
Aug 2024
Denver is a huge airport. Be prepared to walk plenty.
RogerFlew with United Airlines
DEN
-
SAF
Jun 2024
Also delayed. SAF road under ongoing construction for next several years. Car rental pickup is a disastrous 4 wheel drive off toad experience. Maybe flying ABX is better and then drive up to Santa Fe
MichaelFlew with United Airlines
DEN
-
IND
Mar 2024
Eat before you get on the plane. Arrive at the gate early if you have carry-on luggage.
Verified travelerFlew with Air Canada
DEN
-
COS
Mar 2024
Make sure if you need a wheelchair you have plenty of time to between connecting flights.
Verified travelerFlew with Air Canada
COS
-
DEN
Mar 2024
Make sure to have snacks and drinks with you if you need them.
BindulFlew with United Airlines
DEN
-
IAD
Feb 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.
RebeccaFlew with United Airlines
DEN
-
MSO
Feb 2024
Big comfortable chairs that you can sleep on the B concourse.
BrianFlew with United Airlines
DEN
-
ORD
Jan 2024
Big airport. Make sure you have enough time between flights for rest, eating, etc…
RalphFlew with Southwest
DEN
-
PSP
Feb 2024
If you really want a better seat make sure you upgrade.

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 airlines fly most frequently to the United States?

    Colorado and United States are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (7,728 flights per week), Air Canada (2,984 flights per week), and Southwest (2,359 flights per week).

  • How many airports are there in the United States?

    There are 583 airports in the United States. The busiest airport is Hartsfield-Jackson Atlanta Airport (ATL), with 7% of all flights arriving there.

  • 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 San Diego Airport (SAN), with an average flight price of $128.

  • 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 $332. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $491 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 $266 on average. Morning departures are around 40% 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 $561.

  • 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 $79 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 $200.

  • 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 $203 (return) on average. On the other hand, the most expensive months are July and November, when the average cost of round-trip tickets is $285 and $281 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, which saves you about 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

  • How many cities have direct flights to the United States?

    From Colorado, there are direct flights to the United States from 13 cities. The city with the most direct flights is Denver, with 18,537 direct flights each week.

  • How many direct flights to the United States are there each day?

    There are around 3,253 direct flights from within Colorado to the United States every day. Most flights (43%) depart in the morning.

  • How many direct flights to the United States are there each week?

    Each week there are around 22,769 direct flights from within Colorado to the United States. The most common day for departures is Friday, with 18% of flights taking off on this day.

  • How long is the flight to the United States?

    An average nonstop flight from Colorado to the United States takes 3h 02m, covering a distance of 1264 miles. The shortest route is Denver (DEN) to Las Vegas (LAS) with an average flight time of 1h 55m.

  • How many long-haul flights are there to the United States each week?

    Each week there are around 90 long-haul flights (6-12 hour flight duration), 237 medium-haul (3-6 hour flight duration) and 22,442 short-haul (up to 3 hour flight duration) flights to the United States. The most long-haul flights depart from Denver.

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

    Based on KAYAK flight searches, the most popular destination is New York (9% of total searches to the United States). The next most popular destinations are Las Vegas (8%) and Chicago (5%). Searches for flights to Washington, D.C. (5%), to Los Angeles (4%) and to Seattle (4%) are also popular.

Reviews of the top 3 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.
8.1
Denver Air ConnectionOverall score based on 24 reviews
9.1Crew
7.6Entertainment
8.2Food
8.2Boarding
8.6Comfort
Airline reviews

Missed connection flight because denver air connections plane was delayed a broke

2.0 MediocreAdin, Jan 2026
ORD - MKG
Read more Denver Air Connection reviews

Missed connection flight because denver air connections plane was delayed a broke

The crew handed out candy snacks, and water, which was great. However, the airport and airline are terrible at flying. Multiple delays on our departure flight and on return flight it was delayed so long that we missed the connection flight and had to drive home. Terrible service and did not get any compensation. All of their equipment was broken and they never tested it before the plane landed. We were stuck in Ironwood Michigan for five hours.

Denver air is great flight times and connections a little rough

Communication with delays. Failed to make a connection I ng flight in Chicago.

Excellent, from check Iin to arrival. I was apprehensive about flying a small plane between Ironwood and Chicago, but the flight and service was great. I noticed, after boarding , that my cell phone had little battery left. The flight attendant kindly lent me a charging device to keep me connected with my contact in Chicago upon landing. I will always remember that kindness.

Great snacks and friendly people for check in at Pierre SD!

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

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

Both of my flights arrived early and check in process was smooth

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was late - I was downgraded from first class to coach

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

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.