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    aller simple / aller-retour (one-way / round-trip)

    Grammar & Usage

    compound noun / noun phrase
    neutral

    How it works

    Both terms function as masculine compound nouns, often acting as shorthand for 'billet aller simple' (one-way ticket) and 'billet aller-retour' (round-trip ticket). 'Aller simple' pairs the substantivized infinitive 'aller' with the adjective 'simple', whereas 'aller-retour' coordinates two movement nouns with a hyphen. They can also refer to the journey itself, as in the verbal idiom 'faire l'aller-retour'.

    Sample sentences

    Je voudrais un aller simple pour Lyon en seconde classe, s'il vous plaît.

    I would like a one-way ticket to Lyon in second class, please.

    Le billet aller-retour coûte souvent moins cher que deux allers simples.

    A round-trip ticket often costs less than two one-way tickets.

    Il fait l'aller-retour entre Paris et Bruxelles tous les jours pour son travail.

    He makes the round trip between Paris and Brussels every day for work.

    Quick facts

    gender:masculine (un aller simple, un aller-retour)
    plural:des allers simples, des allers-retours
    abbreviation:A/R (frequently used for 'aller-retour')

    Mnemonic

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    Example

    Je voudrais un aller simple pour Lyon en seconde classe, s'il vous plaît.

    I would like a one-way ticket to Lyon in second class, please.

    Le billet aller-retour coûte souvent moins cher que deux allers simples.

    A round-trip ticket often costs less than two one-way tickets.

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