Southwest just put its summer 2027 schedule on sale, and it's the biggest summer they've ever flown. If you're already picturing a family trip next June or July, southwest summer 2027 flights are open to book right now. But before you grab the cheapest fare on the screen, hang on. For a family, the lowest price and the lowest total cost are often two different things. The rest of this is the details.

What's actually on sale

The schedule covers June 3 through August 2, 2027, with 4,498 trips on the busiest days. That's more than Southwest has ever offered in a summer. A few of the changes that families will notice:

  • Orlando goes up to 173 daily trips, and Las Vegas to 278.
  • Austin gets weekend flights in June and July to Nassau, Punta Cana, and Liberia, Costa Rica.
  • Nashville adds Nassau and Turks and Caicos, plus Boise.
  • San Diego and a handful of seasonal routes (Anchorage, Bozeman, Portland) come back or grow.

One catch worth knowing: a separate, shorter schedule for the July 4 stretch hasn't been published yet. So if your trip is built around the holiday, you're waiting a bit longer.

The fare you pick changes the whole trip

Southwest sells four fares now: Basic, Choice, Choice Preferred, and Choice Extra. Everybody gets a free carry-on and a personal item. Past that, the differences are where the money hides.

  • Basic is the cheapest ticket. You don't pick your seat; one is assigned at check-in. You board last. And you can't change it unless you upgrade the fare.
  • Choice lets you pick a standard seat when you book, board in the middle of the pack, and change the flight by paying only the fare difference.
  • Choice Preferred adds a seat near the front, earlier boarding, and a full refund if you cancel.
  • Choice Extra adds two free checked bags per person.

Now the part most people skip. On Basic, Choice, and Choice Preferred, a checked bag costs $45 for the first and $55 for the second, each way. A family of four checking one bag apiece, round trip, is 4 bags × $45 × 2 flights. That's $360 before anyone has bought a snack.

Read that last line again. A fare that looked $40 cheaper per ticket can lose that lead in the first minute at the bag drop.

Why a flexible fare can save you money

You're booking about eight months out. Prices move in that time, and plans do too. This is where Choice earns its keep.

  • Southwest doesn't charge change fees. On Choice and up, if the fare drops after you book, you can rebook at the lower price and get the difference back. On Choice it comes back as a flight credit; on Choice Preferred it can go back to your card.
  • On Basic you can't make that move without upgrading first.
  • If you cancel a Basic fare, the credit expires six months after the day you booked. Buy a ticket today for June 2027 and that credit runs out before summer even starts.

And one more thing for round trips. If either leg is Basic, you can only cancel when you cancel both legs. So you can't drop just the return.

Who this helps, and the catch

If you carry very little, like a single backpack each, Basic can still be the right call. I'd just go in knowing you won't choose your seats and you board last. I can't tell you from Southwest's own pages how that plays out when you're trying to sit as a group, so if that matters to you, check it before you book.

If you check bags, the math flips fast. Southwest's co-branded credit cards give the cardholder, and up to 8 other people on the same reservation, a free first checked bag. Add your Rapid Rewards number when you book. Those cards carry an annual fee, so line it up against what you'd actually save on bags. For the family of four above, that's up to $360 a round trip. Second bags are still $55 each way, and authorized users don't get the perk.

Either way, the fare bundle you choose is a bigger lever than which Tuesday you fly.

What I'd do now

  • Decide how many bags you'll really check. Count them, round trip.
  • Price the same flight on Basic and Choice, then add the bag fees to Basic. Compare the totals, not the tickets.
  • If you're booking this early, lean toward a fare you can change, and check back on the price a few times before summer.
  • Holding a Southwest card already? Put your Rapid Rewards number on the reservation so the free bag applies.

If you want more plain-English breakdowns like this before you book your next trip, subscribe to the YouTube channel, @ChasingSummerPoints. Same idea every time: what changed, what it costs you, and what to do about it.