Halloween
20
%
Promo code
Verified
We recommend
Applied 14 times
+1
$
150
Promo code
Verified
Valid 4 Days
Applied 21 times
15
%
Promo code
Verified
Applied 34 times
15
%
Promo code
Verified
Applied 9 times
$
100
Promo code
Verified
Applied 26 times
$
500
Special offer
Applied 15 times
$
500
Special offer
Applied 14 times
$
50
Special offer
Applied 11 times
Sign up to receive week deals
Expired, but try! The codes might work
40
%
Promo code
The Special Offer is expired
Applied 115 times
30
%
Promo code
The Special Offer is expired
Applied 96 times
25
%
Promo code
The Special Offer is expired
Applied 119 times
$
200
Special offer
The Special Offer is expired
Applied 31 times
When is the best time to buy at Southwest Airlines?
The number of promo codes added by month
0
2
4
6
8
10
Jan
Feb
Mar
Apr
May
1
Jun
2
Jul
2
Aug
4
Sep
1
Oct
2
Nov
3
Dec
How to use a coupon code on Southwest Airlines?
-
Select a ServiceChoose the service that interests you.
-
Enter Booking DetailsFill in the required booking details, such as departure and arrival dates, destination, and the number of passengers for a flight.
-
Find the Promo Code FieldOn the same tab, look for the “Promo Code” field.
-
Apply the Promo CodeEnter your promo code and enjoy its effect on the total cost.
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New Southwest Airlines Coupon Codes September 2025
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Reviewed byAndrew Priobrazhenskyi
Editor & Deals Expert View codes again Southwest.com
