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The cheapest order to fly London, Paris and Barcelona from Atlanta

There are 6 ways to fly these cities. They do not cost the same. The cheapest works out at about $878 a person and the most expensive at $1,078, a difference of $200 for visiting exactly the same places.

Fly them in this order

Atlanta → London → Paris → Barcelona → Atlanta

About $878 per person in flights, based on fares recently seen on these routes.

Every order, priced

  1. Atlanta → London → Paris → Barcelona → Atlanta$878
    cheapest order
  2. Atlanta → London → Barcelona → Paris → Atlanta$899
    $21 more per person
  3. Atlanta → Paris → Barcelona → London → Atlanta$976
    $98 more per person
  4. Atlanta → Barcelona → Paris → London → Atlanta$1,007
    $129 more per person
  5. Atlanta → Paris → London → Barcelona → Atlanta$1,022
    $144 more per person
  6. Atlanta → Barcelona → London → Paris → Atlanta$1,078
    $200 more per person

Why London first

  1. Atlanta to London$246
  2. London to Paris$37
  3. Paris to Barcelona$35
  4. Barcelona to Atlanta$560
  • Out of Atlanta, London is the cheapest first stop at about $246. Barcelona would be $422.
  • Going home, the cheapest flight leaves from London at about $519, but the cheapest order ends in Barcelona at $560 because the rest of the route is cheaper that way.
  • The dearest order pays $600 for Paris to Atlanta, a flight the cheapest order never takes.
  • Barcelona to Atlanta is 64% of what the cheapest order spends on flights, so it is the leg to watch.

Between the cities

  • London to Paris: about 340 km (210 miles) as the crow flies. Also by ground: Eurostar, about 2h 20m, usually $60 to $180. Or FlixBus / BlaBlaCar (overnight), about 8h 20m, usually $30 to $60.
  • Paris to Barcelona: about 830 km (520 miles) as the crow flies. Also by ground: TGV, about 6h 40m, usually $50 to $150.

Entry rules on a US passport

  • US passport: the UK requires an Electronic Travel Authorisation (ETA) for visa-free visitors, including short visits and landside transit. Apply via the UK ETA app before travel. Official source
  • US passport: visa-free in the Schengen area for 90 days in any 180. The Entry/Exit System registers biometrics at the border, and the ETIAS pre-travel authorization may now be required; check the official site. Official source

Rules change; check the official source for your passport and dates before you book.

How much the order matters here

Getting the order right is worth $200 a person on this trip, 23% of what the cheapest way round costs. Of the 107 trips we price in full, that is number 47 for how much the order matters, about the middle: worth getting right, and worth checking against your own dates.

The same cities from other airports

The cheapest order depends on where you start. From Atlanta it starts in London.

  • From New Yorkstart in Paris, about $458 a person, $241 less than the dearest order
  • From Los Angelesstart in Paris, about $752 a person, $182 less than the dearest order
  • From San Franciscostart in London, about $797 a person, $87 less than the dearest order
  • From Chicagostart in Barcelona, about $822 a person, $200 less than the dearest order

What these numbers are

Cached one-way fares, 12 of 12 legs priced from real observations, put together on September 24, 2026, from fares departing September 25, 2026 onwards. Right for comparing one order with another, not a quote for your dates.

A plan prices your own dates and weighs hours as well as fares, so it can pick a different order from this page.

Other trips priced this way

From Atlanta

Trips through the same cities

Put dates on it

Same cities on real dates, plus what one search cannot show: layovers long enough to count as a free city, two tickets that beat one, and cheaper days either side. No account and no card.

One press starts it on January 16, 2027 to January 30, 2027, 14 days, for 2 travelers. Our dates, not yours, and about two minutes.

Plan London, Paris and Barcelona from Atlanta nowOpen the form instead and pick your own dates

Signed out, 3 trips a day per address, priced from cached fares and the free sources, so some legs may be estimates and the plan says which. Signed in, your first trip also searches Google Flights live, and you can change your trips afterwards.