What Terminal is Alaska Airlines at lax . This establishment's state-of-the-art amenities ensure a perfect vacation. Passengers flying Alaska Airlines can check in at Terminal 6, which features numerous stores, expedited security checks, and a selection of dining establishments. For added comfort, eligible travelers can enter Alaska Airlines' first-class lounge via Terminal 6. Travel planning is made simple by Alaska Airlines' position at Terminal 6 at LAX, regardless of your destination.