St. Louis to Edinburgh Flights (STL to EDI): Connections, Flight Time and Arrival Guide

A one-stop trip, with summer the easiest season

There is no nonstop between St. Louis and Edinburgh. Every STL to EDI itinerary connects once, and the choice of connection depends heavily on the season, because most US nonstops to Edinburgh run only in summer.

From spring to early autumn, United flies Edinburgh nonstop from Newark and, in recent summers, from Chicago O'Hare and Washington Dulles. Delta serves it from New York JFK, Boston and Atlanta in season, American from Philadelphia and sometimes Chicago, and JetBlue from New York JFK and Boston. St. Louis has frequent flights to all of those hubs, so a summer one-stop on one ticket is simple.

In winter, most of those seasonal nonstops stop, and the dependable routings go through London or Dublin. British Airways flies St. Louis to London Heathrow nonstop year-round, and Heathrow to Edinburgh is a frequent shuttle of under 90 minutes. Aer Lingus connects through Dublin from Chicago, Newark and other US gateways, with the bonus of US Preclearance on the way home. United's Newark to Edinburgh flight has also run through the winter in recent years, so check it for your dates.

Flight time and distance

St. Louis to Edinburgh is about 4,000 miles (roughly 6,500 km) in a straight line. The transatlantic leg from the East Coast takes 6.5 to 7.5 hours, and from Chicago about 7.5 hours, with the St. Louis feeder flight adding 45 minutes to 2 hours. A realistic eastbound itinerary runs 10 to 13 hours gate to gate, overnight, landing in Scotland in the morning.

Via London, the ocean crossing is about 8.5 hours and the Edinburgh hop short, but the Heathrow connection and the terminal change push the total toward 13 to 15 hours. Westbound is longer in the air but you leave Edinburgh in the morning or midday and arrive in St. Louis the same evening.

Leaving from STL

St. Louis Lambert International has two terminals. Terminal 1 handles American, Delta, United and British Airways; Terminal 2 is Southwest. Security at Terminal 1 is quick outside the early-morning and late-afternoon banks, and for an evening departure to the East Coast that feeds a transatlantic flight, 90 minutes is comfortable.

MetroLink light rail stops at both terminals and reaches downtown in about 30 minutes. If you are flying British Airways direct to Heathrow, the flight leaves in the evening and the check-in desk opens a few hours ahead; allow two and a half hours because it is one of the few long-haul departures of the day and the line forms all at once.

Arriving in Edinburgh and getting into the city

Edinburgh Airport has a single terminal, and arriving from the US you go through UK Border Force passport control, where e-gates handle US passports. If you connected through Heathrow or Dublin, you cleared UK or Irish immigration there and the Edinburgh arrival is domestic or a simple walk-through, respectively.

The airport is about 13 km west of the centre:

• Tram: runs from outside the terminal to Princes Street and on to Leith and Newhaven in about 35 minutes. Level boarding and luggage racks make it the easiest choice with bags.
• Airlink 100 bus: to Waverley Bridge in about 30 minutes, frequent through the day and most of the night.
• Taxi or ride-hail: 25 to 40 minutes to the Old Town or New Town, longer in rush hour and during the August festivals.

When to fly and when to book

August is Edinburgh's peak by a wide margin: the Fringe, the International Festival and the Royal Military Tattoo fill every hotel and push fares up from every US city. Late December is a second peak for Hogmanay, the city's New Year celebration. June and July are busy but manageable, and May and September offer long days, open attractions and softer demand. Winter is cold, dark by mid-afternoon and quiet, with a good chance of a cheap fare via London.

If you are travelling in August, book flights and a room four to six months ahead; both sell out. For the summer nonstops from the hubs, three months ahead gives a good choice. Winter trips via Heathrow or Dublin can usually be booked six to eight weeks out.

Entry requirements and documents

As of recent rules, US passport holders need the UK Electronic Travel Authorisation, applied for online before departure, and can then visit for short stays without a visa. The ETA was introduced in 2025 and other nationalities have different rules, so check the UK government website before you book, and apply only through the official site or app.

If you connect through Dublin, note that Ireland and the UK are separate immigration areas with a Common Travel Area between them; you clear Irish immigration in Dublin and are not routinely checked again on arrival in Edinburgh, but you must still hold the UK ETA.

Time zones and jet lag

Edinburgh is six hours ahead of St. Louis for nearly all of the year, with both places changing their clocks within a couple of weeks of each other in spring and autumn. Eastbound you lose a night; land, drop your bags, walk the Royal Mile in daylight and resist the afternoon nap. Westbound is easier, landing in St. Louis in the evening and sleeping on local time.

What travellers on this route get wrong

The first mistake is assuming a summer nonstop from Chicago or Newark runs in November, then scrambling for a Heathrow routing at a higher fare. The second is leaving the UK ETA until the airport, where airlines can refuse boarding without it. The third is booking August without a hotel first and finding the city full. All three are easy to avoid with a calendar check before you buy.