round trip
US /ˈraʊnd trɪp/
UK /ˈraʊnd trɪp/

1.
a journey to a place and back again
:
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I bought a round trip ticket to New York.
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The bus offers a round trip service to the airport.
1.
involving a journey to a place and back again
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We took a round trip flight to Paris.
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The travel package includes a round trip train ticket.