Nonstop flight route between Portland, Oregon, United States and St. Helens, Tasmania, Australia:
Departure Airport:

Arrival Airport:

Distance from TTD to HLS:
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- About this route
- TTD Airport Information
- HLS Airport Information
- Facts about TTD
- Facts about HLS
- Map of Nearest Airports to TTD
- List of Nearest Airports to TTD
- Map of Furthest Airports from TTD
- List of Furthest Airports from TTD
- Map of Nearest Airports to HLS
- List of Nearest Airports to HLS
- Map of Furthest Airports from HLS
- List of Furthest Airports from HLS
About this route:
A direct, nonstop flight between Portland-Troutdale Airport (TTD), Portland, Oregon, United States and St Helens Airport (HLS), St. Helens, Tasmania, Australia would travel a Great Circle distance of 8,134 miles (or 13,090 kilometers).
A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the large distance between Portland-Troutdale Airport and St Helens Airport, the route shown on this map most likely appears curved because of this reason.
Try it at home! Get a globe and tightly lay a string between Portland-Troutdale Airport and St Helens Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | TTD / KTTD |
Airport Name: | Portland-Troutdale Airport |
Location: | Portland, Oregon, United States |
GPS Coordinates: | 45°32'57"N by 122°24'3"W |
Area Served: | Portland, Oregon |
Operator/Owner: | Port of Portland |
Airport Type: | Public |
Elevation: | 39 feet (12 meters) |
# of Runways: | 1 |
View all routes: | Routes from TTD |
More Information: | TTD Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | HLS / YSTH |
Airport Name: | St Helens Airport |
Location: | St. Helens, Tasmania, Australia |
GPS Coordinates: | 41°20'12"S by 148°16'54"E |
Operator/Owner: | Break O'Day Council |
Airport Type: | Public |
Elevation: | 158 feet (48 meters) |
# of Runways: | 1 |
View all routes: | Routes from HLS |
More Information: | HLS Maps & Info |
Facts about Portland-Troutdale Airport (TTD):
- Portland-Troutdale Airport covers an area of 284 acres at an elevation of 39 feet above mean sea level.
- The closest airport to Portland-Troutdale Airport (TTD) is Portland International Airport (PDX), which is located only 10 miles (16 kilometers) WNW of TTD.
- Operations at times may be limited or restricted as Portland International Airport take-off and approach paths cross directly above Troutdale Airport.
- Because of Portland-Troutdale Airport's relatively low elevation of 39 feet, planes can take off or land at Portland-Troutdale Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
- Portland-Troutdale Airport (TTD) currently has only 1 runway.
- The furthest airport from Portland-Troutdale Airport (TTD) is Tôlanaro Airport (FTU), which is located 10,901 miles (17,543 kilometers) away in Tôlanaro, Madagascar.
Facts about St Helens Airport (HLS):
- The furthest airport from St Helens Airport (HLS) is Corvo Airport (CVU), which is nearly antipodal to St Helens Airport (meaning St Helens Airport is almost on the exact opposite side of the Earth from Corvo Airport), and is located 12,317 miles (19,823 kilometers) away in Corvo Island, Azores, Portugal.
- Because of St Helens Airport's relatively low elevation of 158 feet, planes can take off or land at St Helens Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
- St Helens Airport (HLS) currently has only 1 runway.
- The closest airport to St Helens Airport (HLS) is Launceston Airport (LST), which is located 57 miles (92 kilometers) WSW of HLS.