frontier airlines denver airport

Summer adventures, quick weekend get‑aways, or a business trip across the Rockies – if Denver International Airport (DIA) is on your itinerary, Frontier Airlines will likely be one of the carriers you consider. Known for its ultra‑low fares and transparent fee structure, Frontier offers an affordable way to reach many U.S. destinations from the Mile High City’s bustling hub. This guide dives into what you should know from booking and check‑in to boarding and beyond, ensuring a smooth journey without unwanted surprises.


Why Frontier Airlines Is a Popular Choice at Denver

  • Transparent Pricing – Base ticket prices start low, with optional add‑ons (seat selection, checked bags, priority boarding) priced clearly.
  • Frequent Routes – Over 200 daily flights to 70+ destinations from DIA, covering major cities, vacation hotspots, and regional hubs.
  • Frequent Flyer Perks – Join “Frequent Flyer” or “Premium Flight” programs for status and flexibility.

Tip: Use the Frontier mobile app for instant updates, boarding passes, and the “Cancel & Refund” feature if plans change.


DIA Terminal and Frontier Gates

TerminalGates (Frontier)Shuttle ServiceParking
Terminals 4 & 54A–4F, 5K–5MNon‑stop shuttle every 10 min during peak hoursEconomy & Executive Parking, free at 60 min, then $13/h

Key Details

  • Terminal 4 hosts most Frontier departures. Arrive 2 hours early for domestic flights.
  • Baggage Claim tracks your bag via the automated system—look for the “Frontier” icon.
  • Airport Lounge Access: Avail “Silver or Gold” lounges through the Frontier Frequent Flyer program; otherwise, luggage bags will be stronger free consumption spaces.


Booking & Seat Selection Tips

1. Snag the Lowest Base Fare

  • Book Early: Airfares climb as seats fill; reserve at least 4–6 weeks before departure.
  • Flight Alerts: Sign up for price alerts on both Frontier and fare‑comparison sites like Google Flights or Hopper.

2. Understanding Fees & Optional Extras

FeatureChargeNotes
Seat Selection$6–$36 depending on departure timeReserved seats only available after purchase (not pre‑payment).
Checked Bag$31 per bag, first bag onlyAdditional bags cost $36; weight limit 50 lb.
Priority Boarding$25Recommended if you need to stow luggage near the front.

Example: A round‑trip flight from Denver to Los Angeles advertised at $90 typically adds $75 for a seat, a checked bag, and priority boarding—total $165.

3. Add-Ons After Purchase

  • Frontier’s “Adjust” Option: Log in with your ticket ID to change seats or add a bag up to 2 hours before departure and often at a lower price.


In-Flight Experience

Frontier’s fleets are composed primarily of narrow‑body Airbus A320‑200 and Embraer E190 jets. The cabin features:

  • No Aisle Lounges – Free up the economy seats, expect seats to be tightly spaced.
  • Onboard Snacks – Not included; purchase from the in‑flight cart.
  • Wi‑Fi & Entertainment – Unlimited Wi‑Fi for streaming (extra fees for ultra‑high speed).
  • Travel Classes – All seats are “Economy” but a “Premium Flight” upgrade (extra legroom, priority build‑up/​break‑down) is available for an added cost.


Baggage Policies

Bag TypeFeeWeight CapacityDimensions
Carry‑OnFree40 lb24" x 17" x 9" (packed)
Checked (First)$3150 lb62" linear (L+W+H)
Next Checked$3650 lb62" linear

Helpful Insight: Reserve your checked bag ahead of time rather than at the counter. Frontier offers a discounted rate for the first bag online ($29 when booking 48 hours before departure).


Ground Transportation & Parking at DIA

ModeCostWait TimeExtras
DIA’s DASH (DIA Shuttle)$1.50–$3.0010–15 minFree with a paid ticket
Rideshare (Uber/Lyft)$20–$455–10 minSurge during peak = +20%
Economy Parking$13/h15 min to gate24‑hr prepaid = $35
Executive Parking$21/h10 min to gate24‑hr prepaid = $60

Pro Tip: Purchase a prepaid parking pass from the DIA website or DoorDash to enjoy a flat price for the entire day and avoid hourly surcharges.


Compare Low‑Cost Carriers at Denver

Below is a side‑by‑side comparison of Frontier, Southwest, and Spirit on key factors affecting budget travelers.

FeatureFrontierSouthwestSpirit
Base FareLowest start $30–$50Slightly higher ($40–$70)Lowest ($20–$40)
Checked Bag Fee$31 first bag$0 (up to 2 bags)$30 first bag
Seat Selection$6–$36Free (if purchased early)Free for “Basic” fare
Priority Boarding$25Included in a small fee early (mod forever)$25
Mileage programFrequent FlyerRapid RewardsNone (no rewards)
AccessibilityLimited – no infant seat optionsGood for familiesBasic
Fuel Price AdjustmentsFrequently hiddenTransparentOften hidden

What this means

  • Frontier is ideal for solo travelers or couples who want the cheapest base fare and are willing to pay for extras.
  • Southwest shines for families or frequent travelers due to free checked bags and an award program.
  • Spirit is best for the most price‑sensitive passengers who don’t mind ultra‑basic services.


Frequently Asked Questions

Q1: Can I fly with a dog on Frontier?

Yes—front seat animals are not allowed, but small pets (≤ 20 lb) can travel in the cabin if you reserve in advance. Additional pet fees apply, and you must book expiration beforehand.

Q2: Is Frontier’s “No Fee Flight” option reliable?

The “no fee” or “Basic” fare excludes checked bags, seat selection, and priority boarding. It’s consistently cheaper, but be ready to pay at the airport if you need those items.

Q3: How do I add a travel insurance plan after booking?

Login to your Frontier account, navigate to “Travel Protection” and add or edit coverage. Coverage options start around $5 per trip.


Final Thoughts

Frontier Airlines at Denver International Airport provides an opportunity to travel without a hefty price tag. By making informed choices—booking early, planning baggage, and opting for the right seat—you can keep costs low while still enjoying a comfortable trip. Remember that the airline’s straightforward fee structure is what keeps the base fare competitive; simply choose the add‑ons that align with your travel style.

Plan smart. Fly smart. Happy travels!


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