Best Cheap Airlines in the US: Budget Carriers Ranked for Smart Savers

Best Cheap Airlines: Which US Budget Carriers Actually Save You Money?

How We Evaluated Budget Airlines (and What We Ignored)

Most “best cheap airlines” lists rank carriers by their advertised base fares and stop there. That approach rewards the airlines that strip the most out of their ticket price, which isn’t the same as rewarding the airlines that cost you the least.

greenspicks pulled Travelpayouts fares on August 24, 2026 across 10 route searches, with 9 returning cached fare data. The airlines that appeared in those results include American Airlines, JetBlue, Frontier, and United Airlines, along with several international carriers not relevant to this domestic evaluation. We used those fare observations as evidence points, not as a controlled airline-versus-airline price test. Each fare belongs to a specific route and travel date, so comparing two carriers’ prices directly would be misleading.

Our evaluation framework covers four things: base fare economics (what the ticket costs before extras), service model (ultra-low-cost versus hybrid versus legacy), route coverage strengths, and the total-cost lens that accounts for add-ons you’ll probably need. We weighted the total-cost lens most heavily because that’s where budget travelers actually get surprised.

What this article does not evaluate: loyalty programs, points-and-miles value, international networks, premium cabin products, or in-flight food quality. Those are separate decisions for a different kind of traveler. This is strictly about which carrier gives you the lowest total cost for a domestic flight when you’re paying cash.

Carrier Profiles: What Each Budget Airline Does Well and Where It Falls Short

Each profile below includes one observed fare from Travelpayouts, pulled on August 24, 2026. These are individual fare observations on different routes and dates, not an airline-by-airline price comparison.

Frontier Airlines (Ultra-Low-Cost Carrier)

Frontier operates as an ultra-low-cost carrier, which means its base fares are stripped to the minimum. You get a seat and a personal item (the small bag that fits under the seat in front of you). Everything else costs extra: carry-on bags, checked bags, seat selection, and priority boarding. The airline doesn’t publish those fees in the ticket price, so what you see on a search engine is not what you’ll pay unless you travel with nothing but a backpack.

Frontier’s domestic route network leans heavily toward leisure destinations and mid-size cities. It’s strong on routes between major hubs and vacation spots, particularly in Florida and the West. One observed Frontier fare: $50 one-way, ORD to FLL, nonstop, 188 minutes, departing October 17, 2026.

Who Frontier suits best: you’re flying with only a personal item, you don’t care which seat you get, and you won’t need to change your ticket. If all three are true, Frontier’s base fare is likely close to your total cost. If any of them aren’t true, run the math before you book.

JetBlue (Hybrid Carrier)

JetBlue sits between ultra-low-cost and legacy carriers. Its lowest fare class includes more than Frontier’s (you get a carry-on bag and a personal item), but less than a full legacy ticket. Seat pitch tends to be wider than what ultra-low-cost carriers offer, which matters on flights over two hours.

The airline’s route network is concentrated on the East Coast, with strong coverage from JFK, Boston, and Fort Lauderdale. It’s particularly competitive on routes between the Northeast and Florida or the Caribbean. One observed JetBlue fare: $130 one-way, JFK to MCO, nonstop, 194 minutes, departing October 20, 2026.

Who JetBlue suits best: you want a carry-on included in the base fare and you’re flying from the East Coast. The base fare is higher than an ultra-low-cost carrier, but the gap narrows once you add a carry-on fee to the cheaper ticket.

American Airlines (Legacy Carrier)

American is a full-service legacy carrier with the largest domestic route network among the airlines in our data set. Its base fares tend to be higher than ultra-low-cost carriers, but the ticket includes more: a carry-on bag, a personal item, and (on most fare classes) the ability to select a seat. Change policies vary by fare class.

The tradeoff is straightforward. You pay more upfront, but you’re less likely to get hit with add-on fees at checkout. One observed American Airlines fare: $88 one-way, ORD to MIA, nonstop, 189 minutes, departing January 23, 2027.

Who American suits best: you need a carry-on, you want a seat assignment, and you value schedule flexibility. On routes where American competes with an ultra-low-cost carrier, its higher base fare can end up being the cheaper total cost for travelers who need bags.

United Airlines (Legacy Carrier)

United is another full-service legacy carrier with broad domestic coverage, especially through its hubs in Chicago, Denver, Houston, San Francisco, and Newark. Like American, United’s base fares include a carry-on and personal item on most fare classes. Its Basic Economy fares are more restrictive, limiting bag allowances and seat selection.

One observed United Airlines fare: $127 one-way, LAX to LAS, nonstop, 76 minutes, departing April 10, 2027. That’s the same route where Frontier showed a $19 base fare on a different date, which illustrates how wide the spread can be between carrier types on the same city pair.

Who United suits best: you’re connecting through one of its hubs, you want included bags, or you need schedule reliability on a route with multiple daily frequencies.

Observed Fare Evidence: What greenspicks Pulled Across US Routes

Our editorial team reviewed Travelpayouts cached fares on August 24, 2026 and observed one-way nonstop fares ranging from $19 to $165 across the domestic routes checked. The table below shows every domestic fare observation from that pull. For more on finding cheap one-way flights, see our dedicated guide.

Budget Carrier vs Legacy Carrier: When the Cheap Ticket Costs More

On the LAX to LAS route, greenspicks observed one-way fares ranging from $19 (Frontier, departing October 10, 2026) to $165 (American Airlines, departing July 21, 2027). Those are different airlines on different dates, so the gap is not a direct price comparison. But the spread illustrates something important: base fares vary wildly, and the lowest base fare is not automatically the cheapest trip.

Here’s how the math can flip. Ultra-low-cost carriers price their tickets assuming you’ll buy nothing extra. If you actually fly that way (personal item only, random seat, no changes), you’ll pay close to the advertised fare. Many travelers don’t fly that way. They need a carry-on. They want to sit with their partner. They might need to change a date. Each of those extras adds to the total, and the airline knows it.

Legacy carriers build more into the base fare. A higher sticker price often includes a carry-on bag, a personal item, and basic seat selection. So the question isn’t “which airline has the lowest fare?” but “which airline has the lowest total cost for what I actually need?” For a deeper look at this tradeoff, see our comparison of >when paying more for a full-service airline saves you money.

We can’t give you exact fee amounts here because they weren’t part of our data pull, and airlines change their fee structures regularly. Before you book, check the carrier’s own fee page. Our airline baggage fees comparison covers the current landscape in more detail.

The Total-Cost Question Every Smart Saver Should Ask

Before you book any flight on any carrier, run through this checklist. It takes two minutes and can save you from a checkout surprise.

• Do I need more than a personal item? If you’re bringing a carry-on or a checked bag, check the carrier’s fee page and add that cost to the base fare.
• Do I want to pick my seat? Some carriers charge for any seat selection. Others include it. Know before you click “book.”
• Will I need to change this ticket? Change fees and fare differences vary by carrier and fare class. If your plans might shift, factor that in.
• Is there a nonstop on a different carrier that includes more? A ticket that costs $40 more but includes your bags and a seat assignment might be the cheaper option in the end.

The single question that separates informed budget travelers from those who get surprised at checkout: “What will I actually pay after I add what I need?” If you can answer that for each carrier on your route, you’ll pick the right one every time.

How to Pick the Right Budget Airline for Your Trip

Follow these six steps to compare carriers on total cost, not just the number on the search results page. For a broader look at finding how to find affordable domestic flights, our separate guide covers the full fare-finding system.

1. 1

   Search your route on a metasearch tool

   Use a flight metasearch engine to see which carriers fly your route nonstop. This gives you the full picture of available options before you start comparing.

   Ready to search? Search current fares for your route and dates – check current fares for your dates.

2. 2

   Note the base fare for each carrier

   Write down the base fare for every airline showing a nonstop on your route. This is your starting point, not your final number.

3. 3

   Check each carrier’s fee page for bags, seats, and changes

   Go to each airline’s website and look up their current fees for carry-on bags, checked bags, seat selection, and ticket changes. These pages are usually under “optional services” or “baggage information.”

4. 4

   Add your expected fees to the base fare

   For each carrier, add the fees for the extras you’ll actually use. If you need a carry-on and a seat assignment, add both. If you only travel with a personal item, the base fare may be your total.

5. 5

   Compare total costs, not base fares

   Line up the total cost (base fare plus add-ons) for each carrier. The airline with the lowest total is your best option, regardless of which one had the lowest sticker price.

6. 6

   Book the carrier with the lowest total cost for your specific needs

   Your answer will be different from someone else’s. A traveler with no bags gets a different “cheapest” airline than a traveler with a checked suitcase. That’s the whole point of running this comparison yourself.

Data and Methodology: How This Ranking Was Built

FAQ: Best Cheap Airlines in the US