Route guide

Houston to South Portland Gardens (IAH-PWM): Nonstop Upgrade & Award Space

United Airlines flies nonstop from Houston (IAH) to South Portland Gardens (PWM) just once a week. With so few departures, each one carries the only premium seats on the route that day. 2LNR tracks confirmed upgrade and award space on all of them, so a rare opening doesn't slip past you.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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1
Nonstop flights a week
1,665 mi
Nonstop distance
Free
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Confirmed upgrade & award space on every IAH to PWM 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 South Portland Gardens 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 PWM 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 PWM on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Houston to South Portland Gardens nonstop

Carriers operating IAH to PWM 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 IAH to PWM

How far is South Portland Gardens from Houston?
IAH to PWM covers about 1,665 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 PWM?
United Airlines is currently the only airline flying IAH to PWM nonstop. 2LNR tracks confirmed upgrade and award space on every United Airlines departure.
How often does IAH to PWM operate?
The nonstop currently runs once a week, on United Airlines. Thin schedules like this change by season, and an alert will catch anything added.
How do I check upgrade or award availability on IAH to PWM?
Open the IAH to PWM calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Houston to South Portland Gardens route, and 2LNR will notify you when space opens. It's free to start.

Never miss IAH to PWM upgrade or award space

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