Airfare Deals American Airlines Atlanta ATL Chicago ORD Dallas DFW Denver DEN Los Angeles LAX Miami MIA Minneapolis MSP New York LGA Orlando MCO Portland PDX San Francisco SFO Seattle SEA Airport

Frontier 15 low fares Denver-USA routes under $100 one way have AA/DL/UA competition on 9 routes

a map of the united states

Looking at airfare trends today and it seems like the focus this week for low fare deals are USA domestic routes. Frontier, Southwest, Spirit and Virgin America all have sales. Many routes are unbeatably low with Frontier, but some of these routes are being contested by fares nearly as low or even lower with American, Delta and United.

This post looks at some of the great Frontier deals available today for flights to and from Denver and which routes have competitive fares from American, Delta and United. Below are 15 one way fares from Frontier airlines for Denver routes. There are competitive fares from either American, Delta or United on 9 of these routes.

Google Flights Frontier Airlines Denver – USA fares

Google Flights Frontier Denver fares USA Oct 4

Frontier One Way Fares Tue Sep 20 and AA/DL/UA competitive fares

Most of these fares are available from mid-Aug to mid-Nov or mid-Dec. Consider bag fees when comparing airlines.

DEN – Dallas $39 (AA and UA competitive)

DEN – Houston $39

DEN – Los Angeles $39 (Tue-Wed)

DEN – Minneapolis $39-$44 July – Nov  (UA competitive limited dates)

  • UA $59 (limited Tue-Wed dates Oct-Nov)

DEN – Chicago $59  (AA and UA competitive)

DEN – Bozeman $64 (Frontier has unbeatable fare)

DEN – St. Louis $69 (UA competitive some dates)

DEN – Bismarck $69 (Frontier has unbeatable fare)

DEN – San Francisco $79

  • AA $103 (AA and DL competitive. Personally, as AAdvantage elite with no bag fees, this fare is better deal for me than Frontier with bag fees).
  • DL $90
  • UA $127
  • Virgin America $67 (lowest fare)

DEN – Portland $79

DEN – Seattle $79 (United and Delta competitive)

DEN – Miami $84 (AA and UA beat Frontier’s fare).

DEN – Atlanta $85 (AA competitive and UA on limited dates)

DEN – Orlando $89

DEN – New York LGA $97 nonstop (AA competitive)