There are 2 bus companies operating 4 routes, 1 train company operating 2 routes - Acela Express, Northeast Regional, 5 airlines operating 4 routes. The cheapest bus costs $55 and is 10h 20min. The cheapest train costs $77 and is 7h 40min. The cheapest flight costs $40 and is 1h 30min.
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There are 4 ways to travel from Washington, D.C. to Boston. 4 buses, 2 trains, 4 flights and 1 by car are possible between the two areas. The flight operated by Spirit Airlines running from BWI to BOS is the cheapest. The flight operated by Spirit Airlines running from BWI to BOS is the fastest. The flight operated by jetBlue running from DCA to BOS is the most convenient.
It's important to check each mode when booking your ticket so that you can find the best method for you. The cost of each type varies differently, so be sure to use Faretrotter to keep an eye out!
There are several bus companies - Greyhound, Peter Pan / Greyhound - scheduled to run from Washington, D.C. to Boston. Since there are multiple companies, this should increase your chances of finding a cheaper or discount bus ticket. One train provider, Amtrak, runs trains from Washington, D.C. to Boston. But, because the flight only takes 1h 27min and costs $40, we recommend the flight. Although, the prices for flights vary drastically more so than buses or trains, so as you get closer to your date of travel, the likelihood of finding a cheap flight gets smaller.