Book flights with over 600 airlines & more than 40 ways to pay. Including buy now, pay later. Enjoy year-round discounts, dedicated customer service and optional cancellation protection. Use the search bar above or select one of the popular routes below to start your booking journey.
Alternative Airlines is an online flight-search and booking platform. We offer flights across the globe and have helped millions of customers get where they need to be, including within the USA.
We ticket over 600 airlines, from ultra-low-cost to luxury carriers, and offer more than 40 ways to pay.
We're dedicated to helping our customers. Our expert customer service team is just a phone call or WhatsApp message away.
Still not sure about choosing us? Check out our 4.9-star rating on Trustpilot!
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Choose from over 40 payment methods when you book your flights with Alternative Airlines. Popular methods include, but are not limited to:
Keep your finances secure with a digital wallet. Options include Google Pay and Apple Pay.
Pay via a digital currency. Choose from industry leaders like Bitcoin, Ethereum and Tether.
Put down a 10% deposit. Pay back the remaining cost in the weeks leading up to departure. No interest. No credit checks.
Secure your flights at checkout, pay back the cost in instalments. Plans range from a few weeks to over a year. Interest-free options available.
American Airlines is one of the world's largest carriers. It has a massive domestic route network, flying to almost every state.
It flies to more than 100 destinations within the US.
Delta is one of the biggest carriers in the US, and, along with its regional subsidiary Delta Connection, has one of the most complete domestic route networks in the country.
It flies to over 200 destinations within the US.
Frontier Airlines is a low-cost US carrier. It's a popular option for cheap airfares across the US.
It flies to more than 100 destinations across the US.
Allegiant Air offers domestic flights all around the US. It has a number of hubs and flies all across the country.
It flies to around 120 destinations across the USA.
JetBlue is a low-cost US airline that has its main base at John F. Kennedy International Airport.
It flies to more than 80 destinations across 30 states.
United Airlines and its domestic subsidiary, United Express, operate flights across the USA.
They fly to over 90 destinations across the US.
Your domestic flight check-in time will always depend on the airline that you're flying with and your airport of departure (if you choose to check-in at the airport).
However, generally, online check-in opens 24 hours before scheduled flight departure time and closes one hour before.
If you check-in at the airport, most domestic flights within the USA close check-in around 30-45 minutes before scheduled flight departure time.
Take a look at the check-in times for popular airlines in the US below:
Fly to tourist hubs and remote destinations across the US. Book flights with Alternative Airlines and gain access to exclusive deals and discounts, a wider selection of airlines and more payment options.
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If you're a US citizen, then no, you won't need a passport.
But you'll still need some form of photographic identification compliant with the Real-ID Act.
Children under 18 are not required to provide ID when flying domestically and travelling with an adult. We recommend contacting the airline you're travelling with to ensure there are no additional policies.
If you're flying within the US but not a US resident, you will need to bring your passport.
The TSA (Transportation Security Administration) recommends arriving at the airport 2 hours prior to departure for domestic flights to allow time for check-in, bag drop and security.
However, different airlines and airports have different cut-off times.
Over the years, many US airlines have unfortunately ceased operations. The most recent was Spirit Airlines, which ceased operations in May 2026.
Other defunct airlines include Pan American World Airlines (ceased in 1991), North American Airlines (ceased in 2014), and Trans States Airlines. Find out more in our blog: Airlines that we loved and lost.
As explored in our blog on the cheapest day to buy flights, there is no set day or time to buy the cheapest tickets.
However, if you purchase flights for the off-peak season, you'll be able to save considerably. You can also spend less on flights by booking a night flight. Flights departing and landing at obscure times tend to have less demand and cheaper fares.
Another way to make financing domestic flights easier is by spreading the cost into instalments. Buy now, pay later plans let you pay in manageable instalments that fit your budget.
Take a look at our guide on international airports in the USA to find airports near you.
Checked baggage policies vary significantly by airline and fare type.
Most airlines will offer free hand luggage when travelling domestically within the USA.
Many US domestic airlines charge extra for checked baggage, with a typical weight limit of 50 lbs / 23 kg.
Interstate flights are flights between different states. All interstate flights in the US are domestic flights, however, not all domestic flights can considered interstate flights.
For example, a flight departing from Los Angeles and arriving in San Francisco cannot be considered 'interstate' as both cities are in the same state of California. Read our guide on interstate flights in the USA to find out more information.
