The post-Spirit era of American aviation has officially begun. On May 2, 2026, after 34 years of shaking up the industry, Spirit Airlines closed its doors for good. The yellow planes are grounded, leaving a massive void in the budget travel market.
Specifically, over 1.6 million domestic seats have just vanished overnight.
For those of us who relied on those “bare fares” to get around, the landscape has shifted. The “Spirit Effect”—where legacy carriers were forced to lower prices to compete—is fading, and fares are already ticking upward in major hubs like Fort Lauderdale and Las Vegas.
But don't panic just yet. While the pioneer of the ultra-low-cost model is gone, several other carriers have stepped up with upgraded cabins, new loyalty perks, and a much better reliability record.
Here are the best low-cost airlines to book in 2026.
1. Frontier Airlines: The New ULCC Leader
With Spirit out of the picture, Frontier has officially claimed the throne as the primary budget carrier in the U.S. However, they aren't the Frontier you remember. In 2026, the airline pivoted to “Clear, Upfront Pricing,” moving away from the nickel-and-diming reputation of the past.
- The “First Seats” Upgrade: Frontier is currently rolling out 2×2 “First Seats” in the front of their planes to compete with Spirit’s famous Big Front Seat.
- The Business Bundle: This is the real game-changer for 2026. Their new Business Bundle includes two 50-lb checked bags, priority boarding, and an “UpFront Plus” seat with a guaranteed empty middle seat.
- Insider Tip: If you’re a frequent flyer, the GoWild! Pass is still the best value in the sky for flexible travelers, offering unlimited flights for a flat annual fee (currently trending around $1,999).
2. Breeze Airways: The Premium Disrupter
Founded by David Neeleman (the guy who started JetBlue), Breeze is the fastest-growing airline of 2026 for a reason. They focus on “long, thin” routes—connecting secondary cities like Louisville and Hartford directly to the West Coast without a layover.
- The 220 Experience: Breeze flies the Airbus A220, which features the “Breeze Ascent” product. It’s essentially a first-class seat with massive recline and free snacks at a fraction of the cost of a legacy carrier.
- Breezy Rewards: The 2026 loyalty overhaul introduced the “Buddy Discount.” High-tier “Breezy Club” members now get a multi-use 100% discount for a companion, making it a favorite for couples and families.
- The Tech Perk: Unlike the budget carriers of old, Breeze offers high-speed WiFi that actually works, and it's free for all elite reward members.
3. Southwest Airlines: The Modern Pivot
Southwest underwent its biggest identity shift in 55 years this January. They officially ended the “open seating” era, moving to assigned seating to better compete with the big guys.
- The Bag Fee Era: This is the part that hurts: Southwest no longer flies all bags for free. As of April 9, 2026, travelers on “Basic Bag” fares are charged $45 for the first checked bag.
- The Loophole: If you hold a Rapid Rewards credit card, you still get your first bag free for yourself and up to eight companions. This has become the essential “safety net” for Southwest fans this year.
- Why Still Book? They still have the best change-fee-free policy in the business. If your plans are 50/50, Southwest is the only low-cost carrier that won't penalize you for a last-minute swap.
4. Avelo Airlines: The Secondary Hub King
Avelo has found its niche by dominating airports that everyone else ignored. By flying out of places like New Haven (HVN) and the newly opened base at McKinney National (TKI) in North Texas, they save you the two-hour trek to a major international hub.
- Status Match: In a savvy move following Spirit's shutdown, Avelo is currently offering a status match for former Spirit Saver$ Club members. If you had the yellow card, you can get 12 months of Avelo PLUS for free.
- The “TRYAVELO” Code: Use promo code TRYAVELO through November 2026 for a massive discount on your first base fare as part of their campaign to win over stranded Spirit flyers.
5. The New “Super-Leisure” Carrier: Allegiant & Sun Country
As of May 13, 2026, Allegiant and Sun Country have officially merged. While they are still flying under separate brands for now, they have integrated their rescue fares and loyalty programs.
- The Benefit: By combining Sun Country’s cargo and charter strength with Allegiant’s massive vacation network, the “new” airline is more resilient against fuel price spikes. You can now earn points on an Allegiant flight to Vegas and spend them on a Sun Country flight to the Caribbean.
Budget Carrier Pulse
2026 Reality Check: Fare Volatility
The exit of Spirit has removed the primary source of downward pressure on U.S. airfares. Aviation analysts are seeing a 15% to 20% spike in prices on routes where Spirit was the only competition.
Pro-Tip for 2026: Fuel prices are currently sitting at record highs ($4.51 per gallon). This means “rescue fares” (usually capped at $99–$299) are your best friend if you were caught in the liquidation. If you’re booking fresh, book at least 21 days out—the “last-minute budget deal” is effectively dead for the time being.
