Airline tickets can be expensive, even if you book your tickets well in advance of a trip. Fortunately, there are ways to save money when purchasing plane tickets. One solution is to purchase discounted gift cards for your favorite airlines and use the gift card funds to pay for your flights.

Costco members can save big. If you’re a Costco member, you can get $70 off a Southwest Airlines gift card through November 4. This deal could help you save money on flights to the Southwest for your next trip. Here’s what you need to know about this limited-time offer.

Get $500 to spend on flights to Southwest for $429.99

Costco sells discounted major brand gift cards to its members. You can maximize your Costco membership by taking advantage of these gift card deals. One travel gift card sold by the warehouse club is a $500 Southwest Airlines e-gift card.

This gift card usually costs $449.99, but it’s on sale until November 4. Members can purchase it for $429.99, which is $70 off face value. If you enjoy flying Southwest, you may want to take advantage of this deal before the sale ends to maximize your savings on upcoming flight bookings.

The gift card can be used to pay for Southwest Airlines flights and is redeemable on Southwest.com, the Southwest Airlines mobile app, at Southwest ticket counters or by calling 1-800-I-FLY-SWA. Once purchased, you will receive your digital gift card via email.

Note that there is a limit to the number of gift cards you can purchase. Costco members can purchase up to five Southwest Airlines gift cards in a single transaction. After November 4, the price of this gift card will return to $449.99, so now is the perfect time to purchase this deal if you have a flight to book soon.

If you’re not earning rewards for your Costco shopping, you’re leaving money on the table. Click here to check out the best credit cards for Costco that offer big rewards on your spending.

Here’s another way to save on flight costs

If you’re looking for other strategies to maximize your vacation, use airfare comparison tools like Google Flights.

You can search for flights from multiple carriers and quickly compare prices to find the most affordable flight options that meet your needs. For those with flexible travel schedules, Google Flights offers additional tools to help you save more.

You can use date grid and price chart tools to find the best departure and arrival dates with the most savings. Flying on a cheaper date could leave more room in your budget for activities.

If you’ve scored a Southwest Airlines gift card deal from Costco, these pricing tools can help you further maximize your gift card funds. Every dollar you save adds up.

Travel credit cards can also help

Ready to book and pay for your flights? Remember to use credit cards that earn rewards. You can earn rewards on travel bookings with the right credit card. Many travelers redeem their credit card points or miles for free or lower-cost travel.

Do you want to be rewarded for your travels? Click here to see our list of the best travel credit cards with valuable perks and rewards..