7 Tips for Cheap Airline Tickets to Denver, Colorado

The best way to find cheap airline tickets to Denver, Colorado is to compare many airlines in one search, fly in January, February or early December, book midweek about 40 days ahead, and price the whole trip including bags. Ultra-low-cost carriers such as Frontier suit travelers who can pack a single carry-on. Traditional carriers such as United and Southwest suit travelers who need bags, seat choice or schedule flexibility. Your departure city decides which one actually wins.

The problem is that Denver fares swing hard. Advertised round trips run from about $33 to well over $500 depending on where you leave from, when you fly and what the airline charges on top. Fare sites also disagree about the cheapest month, which leaves most travelers with ten open tabs and no clear answer.

This article puts the evidence in one place. You will get seven tactics for cheap airline tickets to Denver, CO, with sample fares, a month-by-month table, a worked example of true trip cost, and notes on who each tactic suits. Run them in order and you will know what a good price looks like from your own city before you pay.

1. Compare many airlines in one search

How it works

Start with one search that lines up many airlines side by side. EzeeFlights compares fares across 500+ airlines in 241+ countries, so low-cost and traditional carriers appear in the same list for your Denver dates. Enter your departure city, choose Denver (DEN), and sort by price.

Then read past the headline number. Check the stops, the baggage rules and the currency. EzeeFlights displays fares in AED, including applicable taxes and service charges unless stated otherwise, so convert to dollars before you compare against a USD quote elsewhere. Run the same dates on one other site as well, because no single tool shows every fare.

A comparison search turns "cheap" from a guess into a ranked list.

Who it suits

This tactic suits price-conscious travelers who have a departure city but no favorite airline. More than 3.2 million travelers have used EzeeFlights, and support answers by phone around the clock at +1-888-604-0198 if an itinerary needs a change.

It suits you less if you are loyal to one airline's miles program. In that case, compare first, then check whether your airline's own price is close enough to justify earning or burning miles.

2. Fly in the cheapest months

How it works

Denver fares follow demand, and summer and the holidays cost the most. Kayak data puts January as the cheapest month, averaging $246 round trip, while June ($371) and July ($363) are the most expensive. Skyscanner's calendar flags February as cheapest in one place and May in another. Treat "cheapest month" as a range, because your departure city shifts it.

Month	Fare signal	Denver conditions
January	Lowest average, about $246 round trip	Coldest month, 16°F to 45°F
February	Flagged as cheapest month in one fare calendar	Winter weather, ski season
May	Flagged as cheapest in another source	Wettest month, about nine rain days
June and July	Highest averages, $371 and $363	July warmest, 57°F to 90°F
December	Quietest time, usually cheaper	Holiday weeks excepted

Holidays break the pattern. On one nonstop Southwest route in a recent fare sample, a trip around November 6 to 9 cost $117 round trip, while December 19 to January 2 cost $227. Avoid the stretch around Christmas and New Year when you can.

Winter is cheapest to Denver, but only outside the holiday weeks.

Who it suits

Flexible vacationers, remote workers and retirees get the most from this. If you want clear skies, October is Denver's driest month with about three days of rain, and fares then tend to sit between the summer peak and the winter low.

Travelers with fixed dates, such as a wedding in July, cannot use this tactic. Lean on the other six instead.

3. Book midweek and about 40 days ahead

How it works

Tuesday and Wednesday departures often carry lower Denver fares. Southwest and American Airlines both say so on their Denver pages, and weekend departures are the ones that usually cost more. On timing, Skyscanner's analysis of its flight calendar puts the cheapest booking point at around 40 days before departure.

You can test both on any fare calendar:

1. Enter your route and open the flexible-date or whole-month view.
2. Note the price for your preferred day.
3. Shift the outbound and return by one day each and compare.
4. Pick the cheapest Tuesday or Wednesday pairing that still fits your plans.

Who it suits

Anyone whose schedule can move by a day or two benefits, and so do people planning six to eight weeks out. A one-day shift costs nothing and sometimes saves more than any other step here.

Last-minute travelers get less from it. If your dates are fixed around a holiday, treat 40 days as the latest sensible point, not a target. Book earlier once you see a price you accept.

4. Compare the total price, not the headline fare

How it works

A cheap airline ticket to Denver is only cheap after bags and seats. Frontier advertises fares starting around $33 to $34 from cities such as Dallas and Phoenix. Skyscanner has listed Frontier as the cheapest carrier to Denver, while Southwest is the most popular. United warns that its listed Economy fares may be Basic Economy, its most restrictive option. So the sticker price is a starting point, and extras decide the real cost.

Here is an illustrative comparison. The figures are examples, not quotes, so replace them with the fees shown at checkout.

Cost item	Airline A (ultra-low-cost)	Airline B (traditional)
Advertised round trip	$89	$139
Carry-on bag, both ways	$60	$0
Seat selection	$30	$0
Real total	$179	$139

The airline with the lower sticker price costs $40 more once the bag and seat are added. There is no permanent cheapest airline to Colorado, so price each carrier's full trip for your dates.

The cheapest fare on the screen is rarely the cheapest fare at the airport.

Who it suits

Ultra-low-cost fares work best if you travel light, with a small personal item and no seat preference. Solo weekend trips are the sweet spot.

Families, skiers and anyone checking gear will usually do better on a traditional carrier. Adding fees one by one erodes the discount, so run the total before you decide.

5. Check every airport near home

How it works

Where you leave from changes the price more than most people expect. United's own sample round-trip fares for December 2026 show the spread for three-day trips to Denver:

Departing from	Sample round-trip fare
Los Angeles (LAX)	$331
Houston (IAH)	$338
Chicago (ORD)	$416
San Francisco (SFO)	$420
Washington (IAD)	$489
Newark/New York (EWR)	$554

That is a $223 gap between the lowest and highest samples. These are advertised sample fares that may no longer be available, but the lesson holds: a nearby larger airport can beat your home airport. Use the "add nearby airports" option when you search, then subtract what the extra drive and parking will cost.

A one-hour drive can be worth more than a one-day date shift.

Who it suits

Anyone within about two hours of a second airport should test it. People at smaller regional airports gain most, because direct Denver flights from small airports can price high.

It makes little sense if the cheaper airport adds a long drive, an overnight stay or a tight early departure. A $60 saving that costs $45 in parking and fuel is not a saving.

6. Stay flexible on stops and Denver airports

How it works

Nonstop flights cost more. Skyscanner notes that indirect routes often cost less, so uncheck the direct-flights filter and compare. Denver is a major hub, so one-stop options are plentiful from most cities. The trade-off is time, and you should build in a buffer on tight connections, since winter weather can disrupt flights through Denver.

On the arrival side, Colorado Springs (COS) sits about 70 miles south of Denver, and Denver International is roughly 25 miles from downtown, about 35 minutes by taxi, ride-share or public transport. If COS is $60 cheaper round trip but the shuttle or fuel to Denver costs $70, you lose.

Who it suits

Budget travelers with spare time suit one-stop itineraries, especially for trips of a week or more where a few extra hours barely register. Travelers heading to Colorado Springs, Pikes Peak or Garden of the Gods should price COS directly.

Business travelers and anyone with a same-day commitment in Denver should skip this tactic. If you pay for a stop, make sure the layover is long enough to be safe.

7. Set fare alerts, then book at your number

How it works

Price alerts do the watching for you. Set one on your route and let it run for a week or two. Then define a target price from what the comparison searches showed, such as the lowest fare you have seen plus a small margin. When a fare hits it, book.

Be skeptical of "50% off" promises. There is no routine half-price flight to Denver. Real savings come from off-peak dates, airline sales and occasional mistake fares, and airlines sometimes cancel those. Do not pay for nonrefundable hotels around a fare that might not be honored.

Decide your target price before you start watching, or every dip will look like a bargain.

Who it suits

Alerts reward planners who start two to three months out and can wait for a dip. They protect you from the guesswork of "should I book now?"

Know the cancellation terms before you buy. EzeeFlights lets customers cancel within 24 hours of booking, provided the ticket has not yet been issued or confirmed. Refunds go back to the original payment method and can take 10 to 45 days depending on your bank. If you must fly within a week, skip the waiting and book the best fare you have found.

Your next step for a cheaper Denver trip

Cheap airline tickets to Denver come from a handful of habits. Compare broadly, fly in the low months, choose Tuesday or Wednesday, add up the real total, test nearby airports and stops, and book when a fare hits your target. Together they can separate a $331 round trip from a $554 one on the same dates.

Start with your own departure city and your most flexible dates, and if you are leaving from Chicago, read our guide to cheap airline tickets to and from Chicago first. Run one wide search, note the lowest total, and decide your target price. You can start that search at EzeeFlights, compare fares across hundreds of airlines, and book once the number looks right.