Is there a direct flight?

Yes, there are multiple direct flights daily from Seattle to Denver.

How long is the drive?

The drive takes approximately 21 hours, depending on traffic.

What is the best route?

Taking I-90 to I-80 is the most direct route.

Amtrak offers service, but it is not the most practical for this distance.

What is the best time to visit?

Spring and fall offer the most comfortable temperatures.

Monroe

Denver

Flight Driving

Monroe to Denver

Updated: 31 May 2026

The journey from Monroe to Denver is a long-distance trip across the American West. Flying from Seattle-Tacoma International Airport (SEA) to Denver International Airport (DEN) is the most practical method, taking about 2.5 hours of flight time. Driving is a major undertaking, covering over 2,000 kilometers and taking roughly 20 to 22 hours of driving time via I-90 and I-80. This route takes you through the scenic landscapes of Washington, Idaho, Montana, Wyoming, and Colorado.

Total Distance: 2,000 km driving; 1,600 km air distance.

Fastest Way

Flying from SEA to DEN is the fastest, taking about 2.5 hours.

Cheapest Way

Driving is cheaper for groups, but flying is significantly faster.

Compare Monroe to Denver Routes

	Flight Direct	Driving Direct
Duration	2 hours 30 mins	21 hours
Avg Price	$150 - $350	$250 - $400 in fuel
Operator	United Airlines	Personal Vehicle
Route	SEA to DEN	I-90 E to I-80 E
Tip	Flights are frequent and very convenient.	Expect to spend at least three days on the road.

Travel Tips

Airport Arrival
Arrive at SEA at least two hours before your flight.
Road Trip Breaks
Plan stops in cities like Salt Lake City and Cheyenne.
Packing
Bring layers, as the weather in Denver can be cool and unpredictable.
Local Transit
Denver has a great public transit system, including buses and light rail.
Dining
Try the local restaurants in the downtown and LoDo areas.