In 2026, Lisbon, Portugal and Dublin, Ireland consistently rank as the cheapest European gateways from the United States. Lisbon benefits from the competitive pricing of TAP Air Portugal, which frequently offers aggressive deals and free stopovers, while Dublin serves as a low-cost hub for Aer Lingus and various budget transatlantic carriers. Other consistently affordable entry points include Madrid, Spain and Reykjavik, Iceland, the latter serving as a "hopping" point for budget-conscious travelers. Following these, London Gatwick and Barcelona often feature competitive fares due to the high volume of low-cost carrier traffic. For 2026 travelers, flying into these "secondary" hubs and then taking a regional budget flight (like Ryanair or EasyJet) to their final destination remains the most cost-effective strategy for crossing the Atlantic on a budget.