Thompson Falls Airport (KTHM), Montana
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Thompson Falls (KTHM) is an unattended public-use airfield in western Montana, roughly 60 nautical miles from the nearest customs facility at Kalispell (KGPI). It sees a small volume of business aviation traffic, most of it during the warmer months.
Runways
Thompson Falls Airport has one paved runway, 08/26, 4,200 ft long and 75 ft wide, with an asphalt surface.
Runway geometry from published threshold coordinates. Not for navigation.
Source: FAA Form 5010.
Fuel and airfield services
Thompson Falls Airport has 100LL available on the field. The airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Thompson Falls Airport does not clear customs. The nearest port of entry is Glacier Park International (KGPI), 60 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Thompson Falls Airport recorded 11 business aviation movements in 2025. Traffic peaks in July. Business aviation traffic at KTHM is concentrated in the April-through-October window, with July showing the highest single-month count.
Business jet movements, FAA TFMSC count. Peak month July, 4 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Thompson Falls Airport averages 15.4 days above 90°F in July, 27.9 freeze days in December and 2.3 snow days in January. July is the warmest month, with average highs of 86.4°F, and December the coldest, at 32.9°F.
Weather station is 3.4 NM from the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Thompson Falls Airport has published operating constraints in two categories: runway notes and other notes.
Pilot-activated PAPI on runways 8 and 26; medium intensity runway lights on runway 08/26, activated via CTAF.
A 100-foot silo is located in the transitional surface on the northeast side of the runway.
Snow removal is intermittent; check for runway condition.
Marked power lines 7 miles east, from the mainland to Big Island.
Fuel is available 24/7 with credit card.
Waterfowl are present in the vicinity of the airport.
A 300-foot candlestick fixed distance marker is located in the transitional surface.
For clearance delivery, contact Seattle ARTCC.
Source: FAA Chart Supplement.
Nearby airfields
Thompson Falls Airport has five airfields within 48 NM. The closest is Plains, 16.29 NM east.
Source: Skystar calculation from official coordinates.
Skystar at KTHM
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$600.00 catering order at KTHM.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
The $75 minimum applies below $862.50.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
What fuel is available at KTHM?
Thompson Falls (KTHM) offers 100LL only; there is no Jet A on the field. Fuel is available 24/7 via credit card, and the airport itself is unattended.
Is there customs clearance at Thompson Falls Airport?
Thompson Falls Airport has no onsite customs service. The nearest customs facility is Kalispell (KGPI), located approximately 60 nautical miles away.
How long is the runway at KTHM?
KTHM has a single paved runway, 08/26, measuring 4,200 feet long and 75 feet wide with an asphalt surface. This is also the airport's maximum paved runway length.