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How to get fromSan Diego to Thorntonby plane, bus (Amtrak), train, bus, or car

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There are 6 ways to get from San Diego to Thornton by plane, bus (Amtrak), train, bus, or car

Select an option below to see step-by-step directions and to compare ticket prices and travel times in Rome2Rio's travel planner.

  1. Fly to Denver

    best
    1. Fly from San Diego International Airport (SAN) to Denver (DEN)plane plane SAN - DEN
    3h 48m
    $134–218

  2. Fly to Colorado Springs Airport, bus

    cheapest
    1. Fly from San Diego International Airport (SAN) to Colorado Springs Airport (COS)plane plane SAN - COS
    2. Take the bus from Colorado Springs Airport to Denver International Airportbus bus
    6h 47m
    $133–456

  3. Bus via Santa Ana

    1. Take the bus from San Diego to Santa Anabus bus
    2. Take the bus from Santa Ana Bus Stop to Las Vegas BusTerminalbus bus
    3. Take the bus from Las Vegas BusTerminal to Denver Union Stationbus bus
    26h 30m

  4. Train, bus

    1. Take the train from San Diego to Fullerton Amtrak Stationtrain train
    2. Take the train from Fullerton Amtrak Station to Las Vegas Amtrak Stationtrain train
    3. Take the bus from Las Vegas Transportation Center to Denverbus bus
    29h 57m
    $429–818

  5. Drive 1,083.6 mi

    1. Drive from San Diego to Thorntoncar car 1,083.6 mi
    17h 2m
    $198–286

  6. Bus

    1. Take the bus from Broadway & 1st Av to Escondido Transit Centerbus bus 235 / ...
    2. Take the bus from Escondido to Las Vegasbus bus
    3. Take the bus from Las Vegas BusTerminal to Denver Union Stationbus bus
    27h 57m

San Diego International Airport (SAN) to Denver (DEN) flights

Calendar131Weekly Planes
Duration2h 27mAverage Duration
Ticket$86Cheapest Price
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Questions & Answers

Map of how to get from San Diego to Thornton.ExpandLaunch map view
  • Distance: 883.9 mi
  • Duration: 3h 48m

What companies run services between San Diego, CA, USA and Thornton, CO, USA?

Frontier Airlines, United Airlines, and two other airlines fly from San Diego International Airport (SAN) to Denver (DEN) hourly. Alternatively, you can take a bus from San Diego to Thornton PnR Gate B via Santa Ana, Santa Ana Bus Stop, Las Vegas BusTerminal, Denver Union Station, and Union Station Gate B15 in around 26h 30m.

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