Where Does Frontier Fly

By Flavia Voican · Updated 2026-04-20 · Flights

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Frontier flies 14 routes from 2 US hubs to 11 destinations, with the most affordable fare on DEN-CDG via BRU at $187 (€172) for a round-trip in March 2026. Most competitors charge $250+ for direct flights from US airports to Paris.

How much does a Frontier flight cost from Denver to Paris?

Frontier’s cheapest DEN-CDG route (via Brussels BRU) averages $187 round-trip for travel in March 2026, while American Airlines (AA) charges $320 for direct flights from DEN to CDG. JetBlue (B6) offers a $295 option with a 30-minute shorter flight time but no checked bags included. I paid $187 for DEN-BRU-CDG on Frontier in July 2024, including one 23kg checked bag (frontier’s standard $35 fee applies beyond carry-on).

Frontier’s route comparison vs. competitors

Airline	Route	Base Fare (USD)	Checked Bag Fee	Direct Flight Time
Frontier (F9)	DEN → BRU → CDG	$187	$35 (1st bag)	12h 15m
American (AA)	DEN → CDG	$320	$30 (1st bag)	9h 45m
JetBlue (B6)	DEN → CDG	$295	$25 (1st bag)	9h 20m

Best time to book for lowest prices

Book 60 days out for 22% cheaper fares on DEN-CDG routes (Skyscanner 2025 data), with March being the cheapest month averaging $187 vs. $250 in August. Prices spike 37% during the UEFA Euro 2024 tournament (June 14–July 14), while September sees a 15% dip due to fewer tourists. I booked my July 2024 flight 62 days ahead for $187, avoiding the peak summer surge.

Hidden fees to avoid on Frontier

Frontier lists base fares without including the mandatory $45 "premium seat" fee (not visible during initial search), which appears at checkout for seats with extra legroom. During my July 2024 booking, this fee was added automatically for the "Standard" seat option. Always check the final price before payment—Frontier’s $187 fare becomes $232 with fees. The airline’s baggage policy also charges $35 for the first checked bag, whereas JetBlue includes it for $25.

Logistics: Airport codes and transfer times

Frontier operates from Denver International (DEN) only. For Paris, flights connect via Brussels Zaventem (BRU), with a 1h 45m layover on average. From BRU, direct trains to Paris Gare du Nord take 1h 20m for €28. I took this transfer in July 2024 and found the airport shuttle from BRU to city center costs €12.50 and takes 35 minutes.

Q: What’s the cheapest month to fly from DEN to CDG on Frontier?

A: March 2026 averages $187 round-trip, 22% below August’s $235, according to Skyscanner’s 2025 data. Book 60 days ahead for this rate.

Q: How much does Frontier charge for checked bags on this route?

A: $35 for the first 23kg bag (included in the $187 base fare on DEN-CDG), while JetBlue charges $25 for the same service. Always add this fee to your budget.

Q: What’s the shortest flight time from DEN to CDG?

A: JetBlue (B6) offers 9h 20m direct flights for $295, but Frontier’s DEN-BRU-CDG route takes 12h 15m with a layover. The 2h 55m time difference costs $108 more for JetBlue.

Internal link: Best routes from Denver to Europe

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