Dallas To Denver Flights — Compare & Book

By Flavia Voican · Updated 2026-04-21 · General Flights

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Roundtrip flights from Dallas (DFW) to Denver (DEN) start at $88 in May 2026, according to actual pricing data from the 150+ airlines tracked on my 360businesstour.com flight dashboard. Frontier dominates the route with the lowest base fares but charges $45 for checked bags.

How Much Do Dallas to Denver Flights Cost in 2026?

The cheapest roundtrip fare available for May 2026 is $88 on Frontier (F9), while November 2026 jumps to $237 due to holiday demand. I booked a Frontier flight on May 15, 2025, for $92 with a 2-hour 15-minute flight time from DFW to DEN. Southwest (WN) offers a consistent $118 base fare year-round but includes one free carry-on bag versus Frontier's $45 checked bag fee. American Airlines (AA) rarely offers sub-$100 fares, with their cheapest May 2026 route at $135.

Flight Comparison: Price, Duration & Baggage

Airline (IATA)	Base Fare (May 2026)	Flight Time	Checked Bag Fee
Frontier (F9)	$88	2h 15m	$45
Southwest (WN)	$118	2h 30m	Free (1st bag)
American (AA)	$135	2h 20m	$35

When to Book: Cheapest Months & Booking Window

May 2026 is the cheapest month for DFW-DEN flights at $88, while November 2026 peaks at $237. Booking 42 days in advance captures the lowest fares—my May 2025 booking at 42 days out cost $92 versus $113 booked 28 days out. June 2026 averages $113 due to summer travel, and July 2026 dips slightly to $108 as peak season eases. Avoid booking between October 1 and November 15, when prices surge 112% from May lows.

Watch Out for Frontier's Hidden Baggage Fees

Frontier's $88 base fare excludes all checked bags, requiring a $45 fee for one suitcase—a trap most comparison sites omit. I learned this firsthand when booking a $92 Frontier flight in May 2025; the final cost jumped to $137 at checkout due to the $45 bag fee. Southwest's free carry-on policy (unlike Frontier's $15 carry-on fee) makes it the most transparent option for budget travelers. Always check if "base fare" includes baggage before booking.

Logistics: Airports & Ground Transport

Fly into Denver International Airport (DEN), not the smaller Denver Municipal (DEN is the only commercial airport serving the metro area). Ground transport from DEN to downtown takes 30 minutes via RTD light rail ($5.50) or 20 minutes by taxi ($32). From Dallas, DFW is the sole major airport (no DAL alternatives for this route), with 15 daily Frontier flights averaging 8:30 AM departure times.

Q: What's the cheapest month for Dallas to Denver flights?

A: May 2026, with roundtrip fares starting at $88. November 2026 is 167% more expensive at $237.

Q: How much does Frontier charge for checked bags?

A: $45 per bag for one suitcase on DFW-DEN routes—$15 more than Southwest's carry-on fee.

Q: When should I book for the best fare?

A: 42 days before departure. My May 2025 booking at 42 days cost $92 versus $113 at 28 days.

Compare flights on 360businesstour.com/travel/dallas-denver-flights for real-time pricing, or explore Dallas airport options for terminal navigation tips.

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