Southwest's motto says it all: “Low fares. Nothing to hide. That's TransFarency.” This budget-friendly US-based airline prides itself on offering incredible value you can trust—all while providing outstanding customer service. Serving airports across North and Central America and the Caribbean, Southwest Airlines’ 800+ aircraft ferry vacationers, business-trippers, and families to more than 100 destinations. And when you book your SWA flight with Expedia, you can enjoy great deals, affordable fares and rewards as a One Key™ member.  

Guide to Southwest Airlines flights 

What it's like to fly with Southwest Airlines 

When you fly with Southwest, expect prices to be low—and customer service to be first-class. With a range of both complimentary and chargeable drinks and snacks to enjoy on board, you won't go hungry as you soar above the clouds. Nor will you be bored, thanks to the free inflight entertainment offering, free Wi-Fi for text-based apps, and low-cost internet bundles for everything else. And when you book with Expedia, you can still access Southwest's usual perks of zero change fees for selected fare types and flexible cancellation options.   

Southwest Airlines destinations and routes 

Zipping from Houston to Dallas for a business meeting? Island-hopping from Honolulu to Kahului? Jetting off from Baltimore to Orlando for some Florida sun? Wherever you're going, whatever the reason, Southwest's flight network covers some of the most popular destinations in the US—and beyond. From the heritage charm of Charleston, South Carolina to the hustle and bustle of New York City, from the sun-drenched shores of Cancun to the beauty of Montego Bay, there's a whole world waiting to be discovered with Southwest.  

How to check in for a Southwest Airlines flight 

You can typically check in for your Southwest Airlines flight online or in the Southwest app 24 hours before your departure time. Alternatively, you can check in at the self-service kiosks or at the counter when you get to the airport, typically two to three hours before the flight. For a seamless check in process, find all the information you need in the Expedia app: Confirmation codes, passenger information and itinerary details are in the palm of your hand. 

Finding the best Southwest Airlines deals on Expedia 

You're in the right place: Many of Expedia's best deals on Southwest Airline airfares can be found on this page—and that goes for one-way and return flights alike. Want to take to the skies for less? Bundle together your airfare and your hotel booking to unlock amazing package offers and the chance to get even more bang for your buck. 

Cheap Southwest Airlines airfare 

At present, you can find cheap Southwest return flights from $81 and cheap Southwest one-way flights from $41—so you could be jetting off for less than you'd expect.* Bear in mind that tickets are often more expensive when you book last-minute, so try to book your flights at least a few weeks in advance to get great deals. 
* These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply. 

Southwest Airlines' carry-on baggage guidelines 

Generally, you can bring two carry-on items onboard your Southwest flight: one bag and one personal item. Your carry-on bag is stored in the overhead bin and has typical maximum dimensions of 24” (L) + 16” (W) + 10” (H). Your personal item, by contrast, goes under the seat in front of you and should be no bigger than a small briefcase or purse, for instance. If you exceed these limits, you may be charged at the airport—so it's worth checking the rules for your specific route and fare. 

Southwest Airlines' checked baggage allowance  

Most of the time, the maximum weight for Southwest Airlines check-in baggage is usually 50 lb per bag. If your bags are bigger than this or you want to bring an additional bag or two, you may have to pay more: Be sure to check the guidelines for your specific flight, as Southwest may change them from time to time, and fare category before you start packing.

Earn Southwest Airlines points on Expedia 

Every Southwest Airlines flight you book gives you the chance to earn Rapid Rewards points under the airline's loyalty scheme—and that goes for eligible flights booked via Expedia, too. And that's not all. As a member of One Key™ , Expedia’s free travel rewards program, you'll earn OneKeyCash™ on Expedia bookings to save more on your next trip, so you can reap double the rewards.*  

*OneKeyCash is not redeemable for cash and can only be used on Expedia, Hotels.com, and Vrbo.  

Flexible bookings and cancellations with Southwest Airlines 

Sometimes life gets in the way—but many Southwest Airlines bookings made via Expedia can be cancelled free of charge. And if you do need to change or cancel your flight reservation, it's easy to do so. Simply log into your Expedia account and start the simple process. Need a helping hand? Expedia's friendly customer service team is at your service.