Les Misérables has opened its booking to October 2027, seven months past Phantom

Neither of these shows has a closing date, so the only thing either of them publishes about its future is how far ahead you can buy. That number moved this month, and only for one of them.
What changed
Les Misérables at the Sondheim Theatre is now booking to 2 October 2027. A fortnight ago the same page said 13 March 2027; the horizon has been pushed out by close to seven months in one move. Standard tickets are still from £25, sold direct by Delfont Mackintosh Theatres, who also own the theatre — which is why there is no booking fee on top.
The Phantom of the Opera at His Majesty's is booking to Saturday 13 March 2027 and has not moved. It is also from £25, with no fees, and every price carries a £1.70 restoration levy inside it rather than on top.
Why a horizon is not a closing date
An open-ended run sells in windows. The production loads a block of performances, sells into it, and extends before it runs out; the date at the end of the block is an operational decision about how far ahead the company wants to be committed, not a signal about the health of the run. Both of these shows have been extending such windows for four decades.
What it does tell you is planning room. Anyone booking a trip around a specific evening has until October 2027 at one of these theatres and until March 2027 at the other, and the March window will be extended long before it is reached.
The two of them, ten minutes apart
Phantom is in its fortieth year at His Majesty's, the only theatre it has played in London. Les Misérables opened at the Barbican in October 1985, moved to the Palace that December and to the Sondheim in 2004, and has never had a break.
Read a booking horizon as a scheduling decision, not a forecast. A production extends when it has cast contracts, orchestra contracts and a pantomime-free calendar far enough out to sell against — which is why a jump of seven months in one step usually follows a company renewal rather than a change in how the show is selling. The practical consequence for a reader is narrow and worth knowing: the further horizon is where the cheap seats still exist, because a block that has just opened has not been picked over yet.
Source: Les Misérables London checked against the source
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