[Expired] Southwest Airlines Sale: One-Way Fares From $39 [Book by June 19]

Updated: June 20, 2025, 6:10am CDT

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Table of Contents

Southwest Sale Details
Recap on Recent Southwest Changes
Final Thoughts

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Update:

The offer mentioned below has expired and is no longer available.

Southwest Airlines is offering flights from just $39 one-way when you book your tickets by June 19, 2025.

With this offer, you can travel throughout the late summer and fall — and even into December on some routes — though eligible dates vary by destination. Here’s everything you need to know about Southwest’s latest sale.

Southwest Sale Details

No promo code is needed for this sale, but you must book by June 19 at 11:59 p.m. PT and at least 21 days before departure. The full terms are on the promotion’s landing page.

This sale offers fares for $39, $69, $99, and $129 one-way on many Southwest flights. However, be aware that the eligible travel dates vary by destination:

Travel within the continental U.S. between August 5 and December 17, 2025.
- Not valid for travel on Fridays, Saturdays, and Sundays
Interisland Hawaiian flights between July 8 and October 1, 2025.
- Only valid on Tuesdays and Wednesdays.
Travel to or from Hawaii, Puerto Rico, and international destinations from August 17 to December 10, 2025.
- From the continental U.S. to Hawaii and international destinations, you can travel Sunday to Wednesday.
- From Hawaii and international destinations to the continental U.S., you can travel Tuesday to Friday.
- Travel from the continental U.S. to or from Puerto Rico, travel Monday to Thursday.
Blackout dates include the following:
- Flights within the continental U.S.: September 1, October 13, November 24 to 26, and December 1, 2025.
- To Hawaii, Puerto Rico, and international destinations: August 28 to September 2, and November 20 to 24, 2025.
- To the continental U.S. from Hawaii, Puerto Rico, and international destinations: August 28 to September 2, and November 28 to December 2, 2025.
- Interisland Hawaii flights: September 2, 2025.

The sale only applies to flights booked directly with Southwest. Here are a few more terms you should be aware of:

Sale prices apply to one-way Basic fares unless otherwise specified.
Interisland Hawaii and Cuba travel is available for one-way Wanna Get Away Plus fares.
Valid on one-way fares.
Failure to cancel before departure will result in forfeiture of remaining funds on the reservation, and any change in the itinerary may result in an increased fare.
Seats, days, and markets are limited.
Flights are non-refundable and non-changeable.

Here’s an example of a discounted ticket from Chicago Midway (MDW) to St. Louis (STL) that you can book for $39 in Basic and $69 for Wanna Get Away Plus:

Southwest $39 fare sale — Image Credit: Southwest Airlines

Remember, Southwest has an easy-to-use Low Fare Calendar to help you find the cheapest dates when your travel plans are flexible.

Since Southwest Rapid Rewards is a revenue-based program, sales also apply to flights booked using points. Unfortunately, you won’t get outsized value: expect to get around 1.1 to 1.5 cents per point from your Rapid Rewards points.

Southwest $39 fare sale points rates — Image Credit: Southwest Airlines

If you use one of Southwest’s co-branded credit cards to pay for your tickets, you could earn 2 to 4 Rapid Rewards points per $1 spent on your Southwest purchases. These cards also have other perks like anniversary bonus points every cardmember year, EarlyBird Check-In certificates, and more.

Hot Tip:

This sale doesn’t apply to existing bookings, so if you find your same flight is now available at a lower price, you can book it and cancel your existing reservation. Here’s how to change or cancel a Southwest flight.

Recap on Recent Southwest Changes

Remember that Southwest recently introduced basic fares (to replace the previous Wanna Get Away) and ended its popular “everyone gets 2 free checked bags” policy on May 28, 2025. Now, the number of free checked bags you’ll get, if any, depends on what credit cards you hold and whether you have elite status with Southwest Airlines.

Final Thoughts

Southwest has a flash sale advertising fares from $39 one-way. If you book by June 19, you might be able to find a nice discount on your late summer, fall, or early winter travel plans

Remember that the cheapest fares now book into Southwest’s Basic fare type, and the airline is applying its new baggage policy to all bookings made after May 28, 2025. That means you will not qualify for free checked bags when booking the cheapest tickets, and that’s worth considering as you look at ticket prices.