Route guide

Houston to San Diego (IAH-SAN): Nonstop Upgrade & Award Space

United Airlines flies nonstop between Houston (IAH) and San Diego (SAN), roughly 35 times a week. With United Airlines operating this route so often, premium seats still turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every IAH 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.

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35
Nonstop flights a week
1,301 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every IAH 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 Houston 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 IAH 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 IAH to SAN on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Houston to San Diego nonstop

Carriers operating IAH to SAN nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • United Airlines
See IAH to SAN on the interactive map →

Frequently asked questions about IAH to SAN

How far is San Diego from Houston?
IAH to SAN covers about 1,301 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from IAH to SAN?
United Airlines is currently the only airline flying IAH to SAN nonstop. 2LNR tracks confirmed upgrade and award space on every United Airlines departure.
How many flights a week are there from IAH to SAN?
About 35 nonstop flights a week run between Houston and San Diego in the current schedule, operated by United Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on IAH to SAN?
Open the IAH to SAN calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Houston to San Diego route, and 2LNR will notify you when space opens. It's free to start.

Never miss IAH to SAN upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

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