The journey from Portland to Denver covers over 1,800 miles. The most practical way to travel is by air, with connecting flights from Portland International Jetport (PWM) to Denver International Airport (DEN). Alternatively, you can take the Amtrak Downeaster to Boston and transfer to the Lake Shore Limited and eventually the California Zephyr line, which travels directly to Denver. Flying is significantly faster, taking about 7 to 9 hours including airport transit. Denver is a major hub, making it easily accessible from most major airports.
Total Distance: 3,000 km driving distance; 2,700 km straight-line air distance.
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Connecting
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Connecting
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| Duration | 50 hours | 8 hours |
| Avg Price | $350 - $700 | $250 - $600 |
| Operator | Amtrak | United Airlines |
| Route | Downeaster to Boston, transfer to Lake Shore Limited, then California Zephyr to Denver. | PWM to DEN |
| Tip | The train journey is long but offers a scenic way to see the country. | Use the A-Line commuter train to reach downtown Denver from the airport. |
May to September for pleasant weather.