Or enter known letters “Mus?c” (? for unknown)

“Fast train between Washington and Boston”

Here is the verified answer to the Wall Street Journal Crossword clue “Fast train between Washington and Boston”, last seen on September 20, 2026.

Answer hidden — reveal below
A???A

A 5-letter down entry from the Sunday puzzle

The Answer
ACELA

The answer to “Fast train between Washington and Boston” is ACELA

Letters5
DirectionDown
PublishedSep 20, 2026

Letter analysis

The clue “Fast train between Washington and Boston” appeared in the Wall Street Journal Crossword on Sunday, September 20, 2026 as a down entry. The verified answer is ACELA — a 5-letter word that begins with A and ends with A.

This answer contains 3 vowels and 2 consonants. Click through any related clue below to keep solving, or open the full answer key for the day from the link above.

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Frequently Asked Questions

What is the answer to “Fast train between Washington and Boston”?

The answer to the Wall Street Journal Crossword clue “Fast train between Washington and Boston” is ACELA — a 5-letter down entry from the September 20, 2026 puzzle.

How many letters is the answer?

ACELA has 5 letters — 3 vowels and 2 consonants.

Are these answers official?

WSJCrosswordAnswers.org is an independent reference site, not affiliated with the Wall Street Journal. We solve and verify each puzzle by hand before publishing.