Spirit Airlines has finally ceased its operation as of May 2026. The Airline pioneered a modern era of cheaper flight travel in the US as well as around the world. Now that this Air Carrier has shut its operation, travelers want to know about other Cheapest Ultra Low Cost Airlines. You will be surprised to know that there are several cheap air carriers operating in the United States (as well as in other parts of the world). This blog will provide you with all the information about the low-cost carriers in the United States.

Cheapest Ultra Low Cost Airlines with Rescue Fares in 2026

Since the abrupt closure of Spirit Airlines, ULCCs, as well as budget airlines, have come up with system-wide relief offers for passengers. Some Airlines even started offering what they call “rescue fares,” designed to enable passengers scheduled to travel on Spirit to make it to their destination.

Frontier/ JetBlue are among the Airlines that offer such air travel options. Rescue fares usually have a deadline by which one has to travel. You can find these fares only on routes operated by Spirit Airlines. The type of rescue fare can differ between Air Carriers. It ranges from flat fares on rebooked flights to frozen fares on selected routes.

Grouptripo Tip: Passengers can find several Spirit replacement airlines 2026. The catch is to begin your search early to find the cheapest air travel option. Contact the Grouptripo travel representatives for assistance with affordable flight bookings.

What are the best budget Airlines after Spirit’s shutdown?

There are many Airlines that offer budget air travel options in the US. These Air Carriers have kept the legacy of low-cost airfare alive. We have provided the list of the cheapest ultra-low-cost airlines in the US after Spirit’s shutdown below.

• Frontier Airlines
• Breeze Airways
• Avelo Airlines
• Allegiant Air
• JetBlue
• Southwest Airlines

Other legacy Air Carriers also offer cheap fares. You can find affordable deals with these Airlines on several routes (or during special discount seasons).

Features of the Cheapest Airline for domestic flights 2026

Every ultra-low-cost carrier (ULCC) in the US has a wafer-thin profit margin. You will find that these Air Carriers exhibit specific characteristics that help them offer cheaper tickets. We have shared the applicable details hereunder.

• They offer à la carte pricing. Their base fares cover the passenger ticket. You will also be allowed a small personal item.
• Travelers will have to pay for every extra service. It includes seat selection/ baggage. There is no complimentary food/ snack option available on these Airlines.
• You will find more seats on every aircraft. The Airline follows the high-density seating strategy.
• The Airline offers an automated customer service. It helps reduce the extra cost for the Airline.
• These Airlines mainly operate point-to-point routes. Most of their travel destinations are regional hubs. They avoid major connecting hubs.

A Detailed Comparison between Different Low-Cost Airlines

Passengers can make better travel decisions if they know how the various ULCCs perform. This comparison helps you save some bucks when you travel. We have provided the comprehensive comparisons between various Cheapest Ultra Low Cost Airlines below.

Allegiant vs Frontier Cheapest Fares: Which one to choose?

Allegiant Air offers a very good alternative for low-cost travel, as does Frontier Airlines. Many passengers find it tough to choose between Frontier Airlines and Allegiant Air. We have provided the detailed comparison hereunder.

Frontier Airlines

• Passengers will get a lower fare with this Airline.
• This Air Carrier runs massive promotional sales (base fares go below $20 as well).
• It mostly operates point-to-point flights.
• You can take a complimentary personal item.
• Travelers will have to pay for carry-on/ checked bags.
• Seat selection fee is present if you want to choose preferred seats.

Allegiant Air

• You will experience a slightly higher base fare.
• The Airline compensates it with bundle packages (flights + hotels/ cars).
• You will get a free personal item allowance.
• Passengers will have to pay the seat selection fee.
• Allegiant Air will charge you for carry-on as well as checked baggage.
• You will find most flights for the smaller/ underserved regional airports.

Grouptripo Tip: Passengers should use their loyalty status with the Airline to secure better fares. Such frequent flyers get further waivers on fares/ baggage fee/ service charges. Visit www.grouptripo.com for additional help with cheap flight bookings.

Will other Budget Airlines survive after the Spirit shutdown?

The failure of Spirit Airlines has led to widespread discussions regarding the viability of the Ultra-Low-Cost Carrier strategy in general or whether Spirit was merely an exception. A simple answer would be yes; there is hope that other discount airlines might make it through the current crisis, but the upcoming few years will remain extremely challenging and competitive, to say the least.

Although Spirit’s bankruptcy may mean a significant reduction of competition for the surviving budget airlines, the economic issues that have led to the demise of Spirit Airlines (soaring prices on jet fuel/ fierce competition from legacy airlines) are still relevant. The prospects of other major discount carriers show different threats and opportunities for each Airline.

Tips to bag the cheapest Ultra Low Cost Airlines Flight Ticket

You can ensure a cheap flight with ultra-low-cost carriers if you follow the expert tips. It will keep your overall air travel cost low. Check the applicable details hereunder.

• You should keep an eye on the add-on fees. These Airlines charge for every additional service (baggage/ seat selection).
• Take only a personal item with you. It should fit under the seat.
• ULCCs will charge you for extra bags (carry-on/ checked). Only pack essential items in the bag (to keep it light).
• You should book Airline tickets via official channels. It eliminates the administrative fee.
• Travelers need to compare prices before they book flights. You can use Google Flights/ Kayak for this purpose.
• The early flight booking helps you find cheap fares. Book ULCC flights one to six months ahead.
• The travel date flexibility provides better discounts. Mid-week travels are less expensive.
• You need to choose alternative airports for your travel. Most ULCCs serve the small/ unexplored airports.
• You should save yourself from the low-cost Airline’s Credit Card/ Membership trap (especially if you do not want to travel with the Airline on a regular basis).

Summing it up

The cheapest ultra-low-cost airlines will fill the market space left by Spirit Airlines. The big names in this list include Frontier/ Breeze/ Allegiant. They offer dirt-cheap fares to various regional routes. Passengers should understand that these budget carriers cover only the passenger ticket. The base fare may include a free personal item. You will have to pay charges for every additional service (seat selection/ baggage). Travellers should always compare the fares of different budget Airlines to find the best deal for themselves.

Contact the Grouptripo agents for further assistance on this issue. Our expert travel representatives will help you with flight bookings/ changes/ cancellations/ refunds. The seasoned travel experts will be available there for you 24/7.

Disclaimer

The details about the cheapest ultra-low-cost Airlines shared on this page should only be used for informational purposes. It is because these particulars may change over time. We have ensured that the presented particulars are accurate as well as updated. Travellers should corroborate the crucial details from the official sources.