AirHint found the following cheapest return flights from Houston (IAH) to Lisbon (LIS) in April 2026 (see full year).
Return flights
| 23 Apr - 30 Apr | Turkish Airlines | ||
| 01 Apr - 20 Apr | Turkish Airlines | ||
| 05 Apr - 12 Apr | British Airways | ||
| 10 Apr - 19 Apr | Turkish Airlines |
Also check the deals for one-way flights from Houston to Lisbon in April.
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