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How to get fromCarlsbad to Boulderby train, plane, bus, or car

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There are 8 ways to get from Carlsbad to Boulder by train, plane, 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. Train to San Diego International Airport, fly, bus

    best
    1. Take the train from Carlsbad Village Station to San Diego - Old Towntrain train
    2. Fly from San Diego International Airport (SAN) to Denver (DEN)plane plane SAN - DEN
    3. Take the bus from Denver Airport Station Gate 8 to Downtown Boulder Stationbus bus
    6h 10m
    $126–220

  2. Fly from Mcclellan–Palomar Airport, bus

    cheapest
    1. Fly from Mcclellan–Palomar Airport (CLD) to Denver (DEN)plane plane CLD - DEN
    2. Take the bus from Denver Airport Station Gate 8 to Downtown Boulder Stationbus bus
    6h 22m
    $98–454

  3. Train, bus

    1. Take the train from Oceanside to Santa Anatrain train
    2. Take the bus from Santa Ana Bus Stop to Las Vegas Bus Terminalbus bus
    3. Take the bus from Las Vegas Bus Terminal to Denver Union Stationbus bus
    4. Take the bus from Union Station Gate B17 to Downtown Boulder Stationbus bus Ff1 / ...
    27h 5m
    $164–321

  4. Train, bus via Las Vegas

    1. Take the train from Oceanside 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
    4. Take the bus from Union Station Gate B18 to Broadway & Regent Drbus bus Ff2 / ...
    29h 15m
    $406–815

  5. Drive 1,057.1 mi

    1. Drive from Carlsbad to Bouldercar car 1,057.1 mi
    16h 53m
    $193–279

  6. Train to John Wayne Airport Orange County, fly, bus

    1. Take the train from Oceanside to Fullerton Amtrak Stationtrain train
    2. Fly from John Wayne Airport Orange County (SNA) to Denver (DEN)plane plane SNA - DEN
    3. Take the bus from Denver Airport Station Gate 8 to Downtown Boulder Stationbus bus
    8h 53m
    $197–421

  7. Train to Long Beach Airport, fly, bus

    1. Take the train from Oceanside to Los Angelestrain train
    2. Fly from Long Beach Airport (LGB) to Denver (DEN)plane plane LGB - DEN
    3. Take the bus from Denver Airport Station Gate 8 to Downtown Boulder Stationbus bus
    9h 15m
    $127–506

  8. Train, train to Ontario International Airport, fly, bus

    1. Take the train from Oceanside to Los Angelestrain train
    2. Take the train from Los Angeles to Ontario Amtraktrain train
    3. Fly from Ontario International Airport (ONT) to Denver (DEN)plane plane ONT - DEN
    4. Take the bus from Denver Airport Station Gate 8 to Downtown Boulder Stationbus bus
    9h 7m
    $135–547

Carlsbad to Boulder by bus and train

Calendar7Weekly Services
Duration27h 5mAverage Duration
Ticket$164Cheapest Price
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Questions & Answers

Map of how to get from Carlsbad to Boulder.ExpandLaunch map view
  • Distance: 935.4 mi
  • Duration: 6h 10m

What companies run services between Carlsbad, CA, USA and Boulder, CO, USA?

There is no direct connection from Carlsbad to Boulder. However, you can take the train to San Diego - Old Town, walk to Old Town Transit Center, take the bus to Terminal 1 Transportation Island, walk to San Diego International Airport (SAN) airport, fly to Denver (DEN), walk to Denver Airport Station Gate 8, then take the bus to Downtown Boulder Station. Alternatively, you can take a bus from Carlsbad Bl & Oak Av to Downtown Boulder Station via Oceanside Transit Center Stall 8, Oceanside, Santa Ana, Santa Ana Bus Stop, Las Vegas Bus Terminal, Denver Union Station, and Union Station Gate B17 in around 27h 5m.

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