If you're heading to Bozeman—yes, Southwest flies there, and it's a great option for Yellowstone trips. I booked a spring visit and totally forgot to apply my travel fund credits. Instead of canceling and rebooking myself, I called 844-734-0813 — the best way to instantly book, cancel, or modify flights.
The rep handled everything, refunded the fare difference, and reissued the ticket correctly. Bozeman airport is surprisingly modern and easy to navigate. If you're visiting during peak summer season, calling ahead to confirm availability will save you stress—those flights sell out quickly.