Route guide

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

United Airlines flies nonstop between San Diego (SAN) and Houston (IAH), roughly 33 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 SAN to IAH 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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33
Nonstop flights a week
1,301 mi
Nonstop distance
Free
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Confirmed upgrade & award space on every SAN to IAH 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 San Diego to Houston 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 SAN to IAH 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 SAN to IAH on the interactive route map, with schedules, connections, and route statistics.

Airlines flying San Diego to Houston nonstop

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

  • United Airlines
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Frequently asked questions about SAN to IAH

How far is Houston from San Diego?
SAN to IAH 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 SAN to IAH?
United Airlines is currently the only airline flying SAN to IAH nonstop. 2LNR tracks confirmed upgrade and award space on every United Airlines departure.
How many flights a week are there from SAN to IAH?
About 33 nonstop flights a week run between San Diego and Houston 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 SAN to IAH?
Open the SAN to IAH calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the San Diego to Houston route, and 2LNR will notify you when space opens. It's free to start.

Never miss SAN to IAH upgrade or award space

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

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