Spend your voucher however you like. When? Your voucher is valid until December 31, 2021. How? Spend it the way you want, by booking flights or enhancing your trip: Book your flight Seat selection Extra baggage Upgrade to a higher cabin How often? Use it once or as many times as you want until you've spent the full amount (like a gift card). And if you have several vouchers, you can combine them to book your dream holiday: Combine your vouchers How do I use my vouchers? 1 Go to www.iberia.com or open the Iberia app Apple App Store Google Play Store 2 Choose the flights you want to book, or enhance a trip you have already booked: Seat selection Extra baggage Upgrade to a higher cabin 3 Enter the voucher code in the last step of the purchase process, when you reach the payment page.