Frontier's low fares come with a different set of rules than legacy carriers. This guide walks through how to book Frontier flights online, what each fare bundle actually includes, and what to expect for bags, seats, and changes — in plain English.
A quick primer before you dive into fare bundles and add-ons.
Frontier Airlines is a Denver-based ultra-low-cost carrier that keeps base fares low by unbundling almost everything else — seat selection, carry-on bags, and checked bags are typically priced separately rather than included. When people search for Frontier Airlines bookings, they're usually trying to figure out how to book Frontier airlines flights online without overpaying, what a fare bundle actually includes, and how to avoid surprise fees at the gate.
That's where Travel By Airlines comes in. We're an independent resource that organizes publicly available information about Frontier's booking process, fare structure, and travel policies into something you can actually use while planning a trip. We don't process payments or issue tickets — for that, you'll always be pointed toward Frontier's own booking channels or a licensed travel agency.
Think of this page as the research step before you book: the part where you decide whether a bundled fare is worth it, what the Discount Den membership actually offers, and how to pack light enough to skip the bag fees entirely.
The general flow for a Frontier airlines book a flight session, whether you're comparing options first or booking directly.
Enter your origin, destination, and travel dates. Frontier's lowest "Basic" fares are often shown first, with bundles displayed alongside.
Review "GoWild," "Economy," and "Business" bundle pricing side by side to see what's actually included before you commit.
Decide upfront on carry-on, checked bags, and seat selection — adding these during booking is almost always cheaper than at the airport.
Complete your frontier airlines reservations on Frontier's official website or app so your confirmation and receipts are tied directly to your account.
Frontier airfare is built around bundles rather than traditional cabin-based pricing. Here's how they typically differ.
| Fare Bundle | Best For | Typically Included | Flexibility |
|---|---|---|---|
| Basic | Rock-bottom base fare, light packers | Seat only; bags and seat choice cost extra | Minimal; changes and cancellations restricted |
| Economy | Travelers who want a carry-on included | Carry-on bag, standard seat | Moderate flexibility on changes |
| Premium | More space and priority perks | Carry-on, checked bag, stretch seating | Greater flexibility, priority boarding |
| Business | Front-of-plane comfort on select routes | Bags, seat, refundability on eligible fares | Highest flexibility tier |
If your only goal is cheap frontier flights, the Basic bundle can be the lowest sticker price — but once you add a carry-on and a seat assignment, an Economy or Premium bundle often ends up costing about the same while including more upfront.
Frontier doesn't operate traditional first-class cabins on most aircraft — instead, seating is tiered by legroom and location.
Assigned or random standard-legroom seats, included with Economy bundles and above, or purchasable separately on Basic fares.
Extra legroom seats near the front of the cabin or at exit rows, included in Premium bundles or available as a paid add-on.
Front-of-cabin seating with extra space and, on Business fares, added perks like priority boarding and refundability.
Some of the most frequently booked routes on Frontier's network.
| Route | Type | Typical Flight Time |
|---|---|---|
| Denver (DEN) → Orlando (MCO) | Domestic, leisure | ~3h 40m |
| Las Vegas (LAS) → Chicago (ORD) | Domestic | ~3h 10m |
| Denver (DEN) → Cancún (CUN) | Domestic to international leisure | ~3h 20m |
| Philadelphia (PHL) → Miami (MIA) | Domestic, short-haul | ~2h 45m |
| Denver (DEN) → Phoenix (PHX) | Domestic, short-haul | ~2h |
Denver (DEN), Orlando (MCO), and Las Vegas (LAS) are among Frontier's busiest focus cities, so routes through these airports tend to have more schedule options and, at times, better frontier flight deals than less-served city pairs.
Ultra-low-cost carriers release a limited number of seats at the lowest fare bucket. Booking a frontier airlines reservation weeks ahead increases the odds you'll catch that lower price.
Stretch and UpFront seats near the front of the cabin tend to sell out first. Early booking gives you first pick before prices rise.
Carry-on and checked bag fees on Frontier typically increase closer to departure, so adding them at booking is usually cheapest.
Once your online frontier booking is confirmed, you can lock in hotels, car rentals, and activities around fixed flight times instead of guessing.
Baggage is one of the biggest cost differences between Frontier and legacy carriers, so it's worth planning ahead.
Check in through Frontier's website or app, typically opening 24 hours before departure — usually the fastest and cheapest way to get your boarding pass.
Self-service kiosks let you check in and tag checked bags without waiting in the full counter line, though bag fees may be higher than booking online in advance.
Useful for travelers with special baggage, unaccompanied minors, or documentation questions, though counter add-ons often cost the most.
Plans shift. Here's generally how changing a Frontier flight works.
Change flexibility on Frontier depends heavily on which fare bundle you purchased. Basic fares are typically the most restrictive and may not be changeable at all, while Economy bundles and above generally allow changes for a fee plus any fare difference. Business bundle fares often include the most flexible change terms.
If your new flight costs more than your original frontier airfare, you'll generally owe the fare difference in addition to any applicable change fee. Always review the specific fare rules shown at checkout, since they can vary by route and season.
Under U.S. Department of Transportation rules, tickets purchased at least seven days before departure can generally be cancelled within 24 hours of booking for a full refund.
Most Frontier fares are non-refundable and may convert to a travel credit rather than a cash refund; select Business bundle fares can be refundable, depending on fare rules.
If Frontier significantly changes your flight schedule, you're often entitled to rebook or request a credit, even on an otherwise non-refundable ticket.
Refund and cancellation policies can change, so always verify the current terms on Frontier's official website or with the U.S. Department of Transportation.
We're not a booking engine and we're not Frontier. We're a research layer that sits before the booking step.
We translate fare bundles, baggage pricing, and airline terminology into explanations that make sense before you commit to a ticket.
Travel By Airlines is always clear that we're an independent site, never Frontier itself, so you always know exactly who you're dealing with.
Every recommendation on this page routes you back to Frontier's own site, app, or a licensed travel agency to actually complete your booking.
Straight answers to the questions we hear most often about Frontier Airlines bookings.
Use what you've learned here — fare bundles, baggage pricing, and change policies — to book with confidence directly through Frontier's official channels.
Getting your Frontier Airlines bookings right comes down to understanding the bundle system: which fare includes what, how much bags and seats cost as add-ons, and how much flexibility you actually need. None of that requires guesswork once you know how each bundle is built.
Travel By Airlines will keep publishing independent, plain-language guides to help you compare frontier airlines reservations, fare bundles, and travel policies before you book — but when it's time to actually purchase your ticket, that step always happens directly with Frontier or a licensed travel agency. Safe travels, and we hope this guide made your next trip a little easier to plan.