AirHint found the following cheapest return flights from Washington (IAD) to Shannon (SNN) in July 2026 (see full year).
Return flights
| 15 Jul - 22 Jul | United | ||
| 20 Jul - 27 Jul | KLM | ||
| 08 Jul - 22 Jul | Aer Lingus | ||
| 04 Jul - 12 Jul | Lufthansa | ||
| 17 Jul - 24 Jul | Aer Lingus | ||
| 07 Jul - 14 Jul | Aer Lingus |
Also check the deals for one-way flights from Washington to Shannon in July.
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