Boston to San Diego (BOS-SAN): Nonstop Upgrade & Award Space
Alaska Airlines, Inc., JetBlue Airways, Delta Air Lines, and Southwest Airlines fly nonstop between Boston (BOS) and San Diego (SAN), roughly 41 times a week. Because so many carriers compete on this route, premium seats turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every BOS to SAN departure, so you know which flights have space before you book.
Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.
Confirmed upgrade & award space on every BOS to SAN departure
2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Boston to San Diego to see which departures have real space, or watch the route and get alerted when space opens.
See real availability
Confirmed upgrade and award seats on each BOS to SAN departure, checked against live inventory so you know what is open before you book.
Set an alert
Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.
Plan on the map
See BOS to SAN on the interactive route map, with schedules, connections, and route statistics.
Airlines flying Boston to San Diego nonstop
Carriers operating BOS to SAN nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.
- Alaska Airlines, Inc.
- JetBlue Airways
- Delta Air Lines
- Southwest Airlines
Frequently asked questions about BOS to SAN
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Which airlines fly nonstop from BOS to SAN?
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Never miss BOS to SAN upgrade or award space
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