Round trip Denver - San Diego for $159 nonstop

Alaska Airlines has round trip nonstop fares between Denver (DEN) and San Diego (SAN) for $159. This is a significant reduction from the original price of $197, saving approximately 19%. The fares are basic economy, including a personal item and carry-on but no seat selection or changes allowed. Travel dates are available from September through December 2026, with multiple options throughout the months. To book, use Expedia or Alaska Airlines directly, choosing your preferred travel dates within the specified windows. This price drop offers solid savings on convenient nonstop flights during the fall months, making it a good deal for travelers planning trips between Denver and San Diego.