[Deal Alert] Save 20% on Alaska and Hawaiian Flights Across North and Central America Today Only

Alaska Airlines is running a flash sale on flights to and from the U.S., Canada, Mexico, Costa Rica, Guatemala, and Belize, offering savings of up to 20% on select flights.

To score these savings, use promo code THANKYOU20 and book by December 31, 2025.

While you need to move quickly to reserve your trip, you have until May 21, 2026, to complete your travels.

Since time is of the essence here, let’s jump right in.

Alaska Airlines Flash Sale Details

Alaska Airlines is running a promotion that requires you to book a flight by December 31, 2025, in order to save up to 20% on flights across North and Central America. Eligible travel dates for this sale are between January 7 and May 21, 2026.

Luckily, there’s no guesswork required to know which destinations are on sale, as they’re clearly listed in the promotion details:

Routes:

• Flights to and from the U.S., Canada, Mexico, Costa Rica, Guatemala, and Belize, as well as Alaska Airlines and Hawaiian Airlines-operated flights within the State of Hawaii (Neighbor Island).

20% off applies to:

• Flying to Hawaii, Florida, or Latin America: Sunday to Wednesday departures.
• Flying from Hawaii, Florida, or Latin America: Tuesday to Friday departures.
• Flying within Hawaii (between islands): Monday to Thursday departures.
• Flying within the continental U.S., Canada, or Alaska: Monday to Thursday and Saturday departures.

10% off applies to:

• All other days of the week for the destinations listed above.

This sale only applies to flights operated by Alaska Airlines and Hawaiian Airlines, and flights must be booked directly at Alaskaair.com. Flights booked using miles aren’t eligible for the discount, and you need to use the promo code THANKYOU20. Additionally, only economy and basic economy fares are eligible for this discount.

There are some additional terms you should know before booking:

• Blackout dates include travel from January 15 to January 19, 2026, February 12 to February 17, 2026, and from March 17 to April 20, 2026.
• Not valid with any other discounts, including discount codes, coupons, discount programs, MyAccount online discount, or other arrangements.
• First Class fares and some economy fares are not eligible.
• Atmos Rewards credit applies, and upgrades are allowed.
• Not valid on codeshare flights.
• Use promo code THANKYOU20.

Note that the cheapest flights from Alaska Airlines are booked as Alaska Airlines Saver fares when you pay cash. This is the airline’s version of basic economy, so you’ll pay extra for checked bags or choosing your preferred seat in advance. Saver fares cannot be changed but are eligible for a 50% flight credit when canceled at least 14 days before departure.

Is It Worth It?

If you plan to book a trip with Alaska Airlines or Hawaiian Airlines soon, consider booking it during this sale to save money. The same logic applies to anyone heading to the tropical destinations included in this sale.

It’s worth comparing the fares available with this promotion to those offered by other airlines to determine your actual savings.

For example, we found round-trip fares on the nonstop flight from Los Angeles (LAX) to Honolulu (HNL) for $232 round-trip in Saver and $311 round-trip in Main.

Final Thoughts

This is a solid sale from Alaska Airlines and Hawaiian Airlines, offering up to a 20% discount on flights to and from North and Central America if you book today. The eligible travel window runs through May 21, 2026.