Flight
Driving
Seattle to Denver
Updated: 28 May 2026
The trip from Seattle to Denver spans roughly 2,100 kilometers. A non-stop flight takes about 2.5 hours, making it the most efficient choice. Driving takes approximately 20 hours via I-90 and I-80, crossing the rugged terrain of Idaho and Wyoming. Denver is the gateway to the Rocky Mountains, offering high-altitude adventures and a vibrant urban scene.
Total Distance: 2,100 km driving, 1,650 km air distance.
Fastest Way
Direct flight from SEA to DEN takes 2 hours 30 minutes.
Cheapest Way
Budget flights are often cheaper than the cost of fuel and hotels for driving.
Compare Seattle to Denver Routes
|
Direct
|
Direct
|
|
|---|---|---|
| Duration | 2 hours 30 mins | 20 hours |
| Avg Price | $100 - $250 | $200 (fuel) |
| Operator | United Airlines | Personal Vehicle |
| Route | SEA to DEN | I-90 E to I-80 E |
| Tip | The airport is far from downtown; use the A-Line train. | Check mountain passes for snow before driving in winter. |
Travel Tips
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AltitudeDenver is a mile high; drink plenty of water to avoid altitude sickness.
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SunscreenThe sun is stronger at high altitudes; wear protection.
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Airport TransitThe A-Line train is the most reliable way to reach downtown.
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WeatherMountain weather changes rapidly; always carry a jacket.
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BookingBook flights early for the best rates.
Safety Tips
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DrivingBe prepared for icy roads in the mountains during winter.
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HydrationStay hydrated to combat the dry mountain air.
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AwarenessBe cautious in downtown areas late at night.
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EmergencyKeep an emergency kit in your car.
People Also Ask
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Is Denver safe?Denver is generally safe, but exercise standard city precautions.
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How long is the flight?About 2.5 hours for a direct flight.
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Do I need a car?A car is helpful for visiting the mountains, but not for downtown.
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What is the best time to visit?June through August for hiking, December for skiing.
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Is the drive scenic?Yes, the route through Wyoming is very beautiful.
Quick Info
- From Seattle, Washington, United States
- To Denver, Colorado, United States
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Modes
Best Time to Travel
Summer for hiking or winter for skiing in the nearby mountains.
Things to Do in Denver
1
Red Rocks Park
Visit this world-famous outdoor amphitheater carved into red rock formations.
2
Denver Art Museum
Explore extensive collections of indigenous art and modern masterpieces.
3
Union Station
Experience the historic heart of the city, now filled with shops and restaurants.
4
Denver Botanic Gardens
Stroll through beautiful themed gardens in the middle of the city.
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