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Roundtrip is where the deepest discounting sits, because airlines price return itineraries to fill both legs and an aggregator can mix carriers across the outbound and inbound where a single airline cannot. Code RT45 applies up to $45 off roundtrip bookings at CheapOair through 6 September. The practical technique with a roundtrip search is flexibility on the return rather than the departure — shifting the inbound by a day frequently moves the fare more than shifting the outbound does, because return legs on Sunday and Monday carry the heaviest business and leisure demand. Compare a few date combinations before applying the code.

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Code RT45 applies up to $45 off roundtrip bookings at CheapOair, entered at checkout.
Airlines price return itineraries to fill both legs, and an aggregator can combine different carriers across outbound and inbound where a single airline cannot.
The return, usually. Sunday and Monday inbound legs carry the heaviest demand, so shifting the return by a day often moves the fare more than changing the departure.
The promotion runs through 6 September 2026.
No — Subscribsy is free for shoppers. Brands pay a referral fee when you choose their deal.
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