How long is the flight?

A direct flight takes about 4 hours.

Is there a direct train to Denver?

No, you must transfer in Chicago.

What is the best way to get around?

A car is recommended for exploring the mountains.

Denver is generally safe, but stay aware of your surroundings.

Arlington

Denver

Train Flight

Arlington to Denver

Updated: 28 May 2026

The journey from Arlington to Denver covers about 2,700 kilometers. Flying is the most efficient option, with direct flights from DCA or IAD to DEN. For a scenic experience, the Amtrak train offers a journey through the heart of the country, though it requires a transfer in Chicago. Driving is a multi-day trip across the Great Plains. This route is popular for those heading to the Rocky Mountains.

Total Distance: 2,700 km driving distance; 2,400 km straight-line air distance.

Fastest Way

A direct flight from IAD to DEN takes about 4 hours.

Cheapest Way

Booking a flight in advance is usually cheaper than the train.

Compare Arlington to Denver Routes

	Train Connecting	Flight Direct
Duration	45 hours	4 hours
Avg Price	$300-$700	$200-$500
Operator	Amtrak	United Airlines
Route	Union Station DC to Chicago to Denver	IAD to DEN
Tip	The California Zephyr segment is one of the most scenic in the US.	DEN is a major hub with easy access to the mountains.

Travel Tips

Altitude
Denver is a mile high; drink plenty of water to avoid altitude sickness.
Airport
Use the A-Line train to get from DEN airport to downtown Denver.
Weather
Mountain weather is unpredictable; always pack layers.
Driving
If driving in the mountains, ensure your car has good tires for snow.
Booking
Book your mountain excursions well in advance.