Yes, you can use popular companion fares to travel to Hawaii in 2026, but the rules vary significantly by carrier. The Alaska Airlines Famous Companion Fare™ (from the Alaska Airlines Visa® card) is the most flexible; it allows you to book a flight for a companion for $99 plus taxes/fees (usually totaling around $122) to any destination Alaska or its new subsidiary, Hawaiian Airlines, flies. This includes all Hawaiian islands and involves no "blackout" dates, provided there is a coach seat available for purchase. For Delta Air Lines, the Companion Certificate issued with the Amex Delta Platinum or Reserve cards also includes Hawaii as of the 2024 policy update. However, Delta's certificates are more restrictive, requiring specific fare classes (L, U, T, X, or V) to be available. Southwest Airlines Companion Pass holders can also fly to Hawaii with their designated companion for just the cost of taxes ($5.60 each way), making it arguably the best value for West Coast travelers. Always remember that for all these programs, both passengers must be on the exact same itinerary and booked at the same time to utilize the benefit.