These routes use a secondary airport + a short train ride as an alternative to the direct flight — compare live prices on Kayak to see if the combo wins on your dates.
Flying SFO → Milan via Bergamo (BGY) with a 60-minute rail connection to Milano Centrale yields a verified arbitrage of $443 versus the primary Malpensa (MXP) direct fare. The Bergamo–Milan rail shuttle runs every 30 minutes at €5 one-way, comfortably inside the layover safety buffer.
See the breakdownSkip Malpensa: fly London Luton → Milan Bergamo (Ryanair/EasyJet), then Trenord rail to Milano Centrale. Saves £140+ vs the direct LHR-MXP fare, and the rail shuttle runs every 30 minutes well inside the buffer.
See the breakdownFly JFK → Fort Lauderdale (FLL) on a low-cost carrier, then Tri-Rail straight into Miami. The Tri-Rail connection runs every 20 minutes and lands you downtown for under $9 — typically $60+ cheaper than flying direct into MIA.
See the breakdown