Spirit vs Frontier 2026

Update (May 2026): Spirit Airlines ceased all operations on May 2, 2026 and is now in Chapter 7 liquidation. It no longer sells tickets or operates flights, so Spirit is no longer a bookable option. This comparison is kept for reference and for travelers weighing alternatives. With Spirit out of the market, Frontier is the natural ultra-low-cost replacement on overlapping routes; Allegiant and Breeze are also worth checking.

Spirit and Frontier were the two biggest ultra-low-cost carriers in the US, and from a booking page they once looked nearly identical. Both sold cheap base fares with aggressive fee stacking, both packed passengers into 28-inch (71 cm) pitch seats, both charged for carry-on bags on most fares, and both competed for the same budget-traveler dollar. That matchup ended on May 2, 2026, when Spirit ceased all operations and entered Chapter 7 liquidation. The comparison below is kept for reference, but only Frontier remains bookable.

Short version: Frontier is the only flyable option in this pairing. Spirit was historically the narrow winner for most travelers, slightly more reliable, with wider standard seats, a genuinely first-class-like “Big Front Seat” upgrade for travelers who wanted real comfort, Wi-Fi on most of its fleet, and a better mid-tier loyalty program. None of that is bookable now. Frontier is typically a few dollars cheaper on the advertised base fare and runs creative loyalty promotions (like its 2025 $69 Gold status match), and with Spirit gone it is the natural ultra-low-cost replacement on overlapping routes. Allegiant and Breeze are also worth checking on specific routes.

What We Looked For

Ultra-low-cost carriers compete on narrow margins, so the evaluation criteria are different than for legacy carriers:

• Total trip cost, including base fare, bag fees, and seat selection, because the sticker fare hides most of the real price
• Seat comfort, for both standard economy and the upgrade options
• Reliability, since delays and cancellations on a ULCC cost you disproportionately (no rebooking protection)
• Bag policies, especially personal item enforcement at the gate
• Route network, for destination-specific choice
• Loyalty program value, for travelers who fly these airlines more than twice a year

Which airline charges less for bags, Spirit or Frontier?

Only Frontier still sells tickets, since Spirit ceased operations on May 2, 2026. Historically the two charged nearly identical bag fees, and both punished you at the gate if you had not prepaid.

Both airlines charged for carry-on bags on most fares, starting around $59 to $65 when you paid at booking. Both escalated aggressively if you tried to bring a carry-on to the gate without pre-paying, with fees reaching $99 or more. Frontier still works this way, so prepay every bag.

Personal item dimensions were identical on paper: 18 x 14 x 8 inches (46 x 36 x 20 cm) on both Spirit and Frontier. Both were free. In practice, Frontier’s gate sizer is reported to be slightly stricter, with more reports of bags that technically measure under the limit being flagged at the gate. Spirit was not lenient either, but Frontier has the harsher reputation among frequent ULCC flyers.

Carry-on dimensions differed:

• Spirit (no longer operating): 22 x 18 x 10 inches (56 x 46 x 25 cm), narrower but taller
• Frontier: 24 x 16 x 10 inches (61 x 41 x 25 cm), longer but narrower, with a 35-pound (16 kg) weight cap Frontier actively enforces

For Frontier, a rolling carry-on needs to fit the 24 x 16 x 10 inch (61 x 41 x 25 cm) limit, with the 16-inch width being the usual catch. If you previously sized a bag to clear both carriers, Frontier alone is now the only constraint that matters.

Checked bag fees stack the usual way on Frontier: cheaper at booking (typically $47 to $63 for the first bag), more expensive at each later point. Frontier reduced its standard checked bag limit to 40 pounds (18 kg) as of 2026 and charges overweight fees above that cap: $75 for bags from 41 to 50 pounds (19 to 23 kg) and $129 for bags from 51 to 100 pounds (23 to 45 kg) on bookings made on or after April 4, 2026. For reference, Spirit had used the standard 50-pound (23 kg) limit and charged $125 over 50 pounds, but Spirit no longer operates.

Pro tip for Frontier: if you need a carry-on plus seat selection, price a New Frontier bundle (Economy or Premium) instead of stacking each extra à la carte. The bundle is usually cheaper than buying the carry-on and seat separately.

Winner: bag fees

Frontier (only carrier still flying) / Spirit no longer operates; prepay every Frontier bag

Winner: personal item enforcement

n/a / Frontier is known to be strict at the gate; Spirit ceased operations

Does Spirit or Frontier have more legroom and better seats?

On a bookable seat, Frontier is what is left: its standard economy is 28 inches (71 cm) of pitch with Premium extra-legroom seats as the upgrade. Spirit’s celebrated Big Front Seat is no longer available because Spirit ceased operations on May 2, 2026.

Standard economy was identical on paper: 28 inches (71 cm) of pitch on both airlines. This is among the tightest pitch in the US industry. Both used slimline seats that maximize fleet density, which is why they could offer the fares they did. Frontier still flies this configuration.

The seats themselves differed slightly in width and padding:

• Spirit (no longer operating) had slightly wider standard seats, around 17.75 inches (45 cm), with better-rated padding by passenger reviews
• Frontier seats are slightly narrower and use lighter materials (contributing to fuel savings that Frontier passes through as lower fares)

Upgrade options used to diverge significantly:

Spirit’s Big Front Seat (later sold as Spirit First) was the unique ULCC upgrade worth knowing about. It was 18.5 inches (47 cm) wide with 36 inches (91 cm) of pitch, configured in a 2-2 layout, essentially a domestic first-class seat sold for the price of a decent economy upgrade on a legacy carrier. It is no longer available, since Spirit has shut down.

Frontier’s Premium extra-legroom seating offers 33 to 38 inches (84 to 97 cm) of pitch (more in exit rows) but stays in the standard 3-3 configuration. You get more legroom but not more width. Its UpFront Plus seats (front rows with a blocked middle) are the other paid upgrade. Both are the only premium options available in this pairing.

Wi-Fi availability: Spirit used to win here, with Wi-Fi on most of its fleet, while Frontier does not offer it. With Spirit gone, neither bookable option in this pairing has Wi-Fi.

Winner: standard economy pitch

Frontier (28 inches; only carrier flying) / Spirit ceased operations

Winner: upgrade comfort (width + pitch)

n/a / Spirit's Big Front Seat no longer available

Winner: upgrade pitch alone

Frontier Premium / the only upgrade left here

Winner: in-flight Wi-Fi

Neither / Frontier has none; Spirit ceased operations

Is Spirit or Frontier more reliable for on-time flights?

Frontier is the only carrier here you can still fly, since Spirit ceased operations on May 2, 2026. When both ran, Spirit had slightly better on-time rates and fewer cancellations.

Both airlines ranked below the US industry average for on-time performance and cancellation rates, as expected for ULCCs running tight schedules with minimum spare aircraft. Spirit was slightly more reliable than Frontier based on recent 12-month performance data, but that comparison is now historical.

The real reliability issue with a ULCC is recovery. When a Frontier flight is canceled or significantly delayed, the carrier has limited protection for passengers compared to legacy airlines. There is no automatic rebooking on another carrier. You are often left to find your own alternative, and refunds (when offered) take time. Frontier does not run the kind of schedule redundancy that allows easy same-day rebooking when something goes wrong.

For trips where a cancellation would materially affect the plan (cruise departure, wedding, tight connection elsewhere), Frontier is risky. If you must fly it, buy travel insurance or leave yourself a full buffer day. Allegiant and Breeze carry the same caveat.

Winner: on-time performance

Frontier (only carrier flying) / Spirit ceased operations

Winner: cancellations

Frontier (only carrier flying) / Spirit ceased operations

Winner: delay recovery

Minimal on Frontier / true of any ULCC

Does Spirit or Frontier fly to more destinations?

Frontier serves roughly 90 destinations across the budget-leisure market. Spirit’s roughly 90-destination network, including its deeper Caribbean and Latin America routes, disappeared when it ceased operations on May 2, 2026.

Frontier serves the budget-leisure market: US city pairs plus Mexico, the Caribbean, and select Central or South American destinations, around 90 destinations in total. When Spirit operated, the two overlapped heavily, but those Spirit routes are gone now.

Frontier’s network strengths:

• Deeper coverage of the mountain west and Midwest (Denver is a major hub)
• Newer aircraft fleet on average, with more Airbus A321neos (which are more fuel-efficient and quieter)
• More seasonal leisure routes to ski destinations and national parks

Where Spirit used to lead: it had a slightly larger international presence, with deeper penetration into South and Central America (Colombia, Peru, Ecuador) and a strong Florida and Caribbean base at Fort Lauderdale. With Spirit gone, travelers on those routes should check Frontier first, then Allegiant and Breeze, where coverage varies by market.

For a specific trip, Frontier either serves the route or nothing close. If it does not, Allegiant and Breeze are the next ULCCs to check. The one with the better fare on your specific date and time is usually the right answer.

Winner: international leisure (Caribbean, Central/South America)

Frontier (Spirit's routes ended) / verify Allegiant or Breeze for gaps

Winner: domestic mountain west and Midwest

Frontier

Winner: total destinations

Frontier / around 90; Spirit ceased operations

Does Spirit or Frontier have a better loyalty program?

Frontier Miles is the program that still matters here. Spirit’s Free Spirit program ended when Spirit ceased operations on May 2, 2026.

Both airlines ran three-tier loyalty programs. Neither was in the same league as legacy carrier programs. Spirit’s Free Spirit was slightly more useful at the mid-tier, but it no longer applies.

Spirit Free Spirit (discontinued):

• Tiers were: Free Spirit (signup), Silver, Gold
• Redemptions started at 2,500 points
• Silver perks: exit row assignment within 180 minutes of departure, seat selection at check-in, waived overweight fees, expedited boarding and security
• Gold perks added: complimentary Big Front Seat upgrades (subject to availability), more bonus miles, more flexible changes
• Points pooling across family members, with points combinable with cash
• The program is no longer active, since Spirit has shut down

Frontier Miles:

• Tiers: 20k, 50k, 100k status levels
• 20k perks: free carry-on bag, free seat assignment, priority boarding
• 50k perks: free carry-on extends to companions on the reservation
• 100k perks: complimentary Premium seat upgrades (subject to availability)
• Frontier Miles earn rate is generally lower per dollar spent

Frontier’s 2025 status-match promotion: Frontier ran a $69 Elite Gold status match in 2025, letting members of Southwest, JetBlue, Spirit, or Alaska loyalty programs buy Elite Gold status for $69. Applications closed in September 2025, though status granted under the offer runs through December 2026. Gold benefits include a free carry-on, priority boarding, free preferred seat selection, and complimentary upgrades to premium and UpFront Plus seating. Watch Frontier’s promotions page for whether a similar match returns.

Winner: baseline loyalty program

Frontier Miles (only active program) / Free Spirit ended with Spirit's shutdown

Winner: 2025 Gold status-match promo

Frontier / ran a $69 match in 2025; applications now closed

Winner: redemption flexibility

Frontier / the only program you can still earn in here

Is Spirit or Frontier cheaper for a full trip with bags?

Frontier is the only carrier you can price out here, since Spirit ceased operations on May 2, 2026. When both ran, total costs were usually within $10 to $20 on the same route.

When both operated, an identical route with identical add-ons put Spirit and Frontier fares typically within $10 to $20 of each other. Frontier often advertised a slightly lower starting fare. With Spirit gone, the real price comparison for ex-Spirit flyers is Frontier against Allegiant or Breeze on the specific route, since those vary widely by market.

The bundle test: Frontier’s New Frontier bundles (Economy, Premium, and Business) roll in a carry-on, seat selection, and, on Premium and up, priority boarding. On most routes, a bundle is a better deal than adding each item à la carte. If you need a carry-on, always check the bundle price before adding the carry-on fee separately.

The gate fee trap: never bring a carry-on to a Frontier gate without pre-paying. Frontier charges $99+ for gate carry-on fees, which is almost always more than the sticker fare was. This is the single biggest avoidable cost on the airline.

Cancellation cost: Frontier charges less for tickets than for changes or cancellations. If there is any chance your plans might shift, it is not a great pick. Travel insurance through a third party (not the airline) is often cheaper and more useful than the airline’s own “travel guard” product.

What Ex-Spirit Flyers Should Do Now

Spirit ceased operations on May 2, 2026, so its Big Front Seat, Wi-Fi, Latin America routes, and Free Spirit program are no longer available. If you used to fly Spirit:

• For most routes, Frontier is the natural ultra-low-cost replacement, with the closest fare structure and the widest budget network
• Former Free Spirit members who matched into Frontier Elite Gold during its 2025 $69 promotion keep that status through December 2026
• If Frontier does not serve your route, check Allegiant for leisure markets and Breeze for newer point-to-point routes
• The Big Front Seat has no exact equivalent; Frontier’s Premium seats give you more legroom but not the extra width

Who Should Pick Frontier

• You want the absolute cheapest base fare on a specific route and Frontier serves it
• You already hold Frontier Elite Gold (including via its 2025 status match) and plan to fly Frontier more than twice in 2026
• You fly to mountain west or Midwest leisure destinations (ski trips, national parks)
• You want extra pitch in upgrade seating (Premium extra-legroom seating is the only premium option left in this pairing)
• You value newer aircraft (more A321neos in Frontier’s fleet)
• You are optimizing for pure fare and will skip extras

When to Check Allegiant or Breeze Instead

• Frontier does not serve your route at a workable time or price
• You are flying a smaller leisure market that Allegiant specializes in
• You want a newer point-to-point option, where Breeze tends to compete

The Bottom Line

This comparison no longer has two live options. Spirit ceased all operations at 2:30 a.m. ET on May 2, 2026 and converted to a Chapter 7 liquidation, after a second Chapter 11 filing on August 29, 2025 failed to hold. A sustained jet-fuel price spike tied to the Iran conflict pushed fuel to roughly double what its restructuring plan had assumed, exhausting the airline’s liquidity. The shutdown removed more than 500 daily flights and affected about 17,000 jobs. Spirit no longer sells tickets or operates flights, so it is not a bookable option.

That makes Frontier the default winner here by survival, and the most natural ultra-low-cost replacement for ex-Spirit flyers on overlapping routes. Frontier is often a few dollars cheaper on the sticker fare than Spirit was, and it remains the natural landing spot for budget flyers who lost Spirit.

Frontier is still not a good choice for time-sensitive travel. It runs a tight schedule with minimal recovery options when something goes wrong, so if your trip depends on arriving on schedule, leave a buffer day or buy travel insurance. If Frontier does not serve your route well, Allegiant and Breeze are the next ULCCs to check. If you are comparing Frontier to an even more budget-focused option, see our Frontier vs Allegiant comparison, where the route strategies diverge sharply.

Bottom line: for the budget routes Spirit used to serve, book Frontier first and check Allegiant or Breeze where Frontier comes up short. Spirit itself is no longer an option.