Frontier has round-trip flights from Dallas (DFW) to Denver or Chicago (DEN, ORD) for $38-$58, NONSTOP. Flights April to May. Extended weekends available. Origin/Destination reversible.

Read More Nonstop Flights: Dallas to/from Denver or Chicago $38-$58 r/t [April-May] – Frontier

Frontier has round-trip flights from Dallas (DFW) to Denver (DEN) for $38-$58, NONSTOP. Flights April to May. No Sunday departures. Extended weekends available. Origin/Destination reversible.

Read More Nonstop Flights: Dallas to/from Denver $38-$58 r/t [April-May] – Frontier

Frontier has round-trip flights from Dallas (DFW) to Denver (DEN) for $68-$95, NONSTOP. Flights August to October. Departures on Monday, Tuesday, Wednesday, Thursday, and Sunday. No Fridays or Saturdays. Very few extended weekends available. Origin/Destination reversible.

Frontier fares do not include a free carry-on bag. Only a small personal item, like a Jansport SuperBreak backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.

Read More Nonstop Flights: Dallas to/from Denver $68-$95 r/t [August-October] – Frontier

Frontier has round-trip flights from Dallas (DFW) to Denver (DEN) for $33-$47, NONSTOP. $18 each-way. Flights October to November. Departures on Tuesday, Wednesday, and Saturday. Extended weekends available. Origin/Destination reversible.

Note: Frontier fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.

Note: Frontier seats only have 28-inches of pitch; 2-to-3 inches less space than most other airlines.

Read More Nonstop Flights: Dallas to/from Denver $33-$47 r/t [October-November] – Frontier