Southwest's gift card terms and conditions do say you can use up to 3 cards per passenger on each reservation, so in theory you should be able to use nine (or eight plus a credit card). I don't have any experience with this however, and I do know that difficult redeeming multiple Southwest gift cards is a common complaint we see frequently, so it's possible the wording in the terms and conditions is incorrect. If you have issues doing this online you might want to try calling to complete your booking. Alternately, as mentioned earlier you could split the booking up into multiple reservations. Good luck! Southwest gift cards – A maximum of three Southwest gift cards can be applied per passenger on each reservation. If your purchase exceeds the amount available on the three Southwest gift cards, you will only be allowed to use two Southwest gift cards and another form of payment will be required for the difference.
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