Guadalajara (GDL) to San Juan (SJU): 2,429 miles (3,910 km) great-circle, about 5h 20m nonstop by our estimate. Cheapest fare observed: $524 round-trip on Viva Aerobus, with 2 stops, departing May 12, 2026.
$524 round-trip, Viva Aerobus VB1057, departing 2026-05-12 at 06:05, returning 2026-05-26. The recorded itinerary left on a Tuesday, returning on a Tuesday 14 nights later; the fare was observed 17 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $524, it ranked 18th of the 30 round-trip fares we recorded from GDL (median $427). That is 21.6 cents per great-circle mile (round-trip price over one-way distance), below the GDL median of 25.3 cents across 30 round-trip routes.
Routes from GDL of similar length: Boston (2,405 mi) at $677 and Caracas (2,506 mi) at $775.
Viva Aerobus had the cheapest fare on 9 of 30 GDL routes. It is the 9th longest of the 30 routes we track from GDL.
Of 20 departure airports with a fare to San Juan, Guadalajara (GDL) ranked 17th at $524. Lowest: $127 from Orlando (MCO); highest: $632 from Washington DC (IAD); 7 nonstop. Cheapest-fare airlines (routes): Frontier (9), Spirit (4), American Airlines (2), JetBlue (2), Southwest (1) and United Airlines (1), plus 1 more.
That depends on your passport and trip, so check the official source for United States: U.S. Customs and Border Protection: international visitors. Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Mexico_City, America/Puerto_Rico; flight time is our estimate.