Cheapest Day to Book Europe to US Flights

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Cheapest Day to Book Europe to US Flights

Last updated: April 2026 · 11 min read

If you want the short answer: book on a Tuesday or Wednesday, fly out from Europe on a Tuesday or Wednesday, and you'll usually shave 4-14% off the headline price. But after booking LHR-JFK five times in the last three years, plus a couple of DUB and AMS hops, I'll be straight with you. The day of the week is the smallest lever you've. Route flexibility, your advance booking window, and the season you fly will save you far more.

TL;DR: Tuesday and Wednesday are the cheapest days to both book and depart on Europe-to-US transatlantic routes, with average savings around 4-14% versus weekend bookings or Friday/Sunday departures. The bigger wins: book 8-12 weeks ahead for summer, 4-8 weeks ahead for shoulder season, stay flexible on airports (LGW vs LHR, EWR vs JFK), and avoid mid-June through August if your wallet matters more than your calendar.

What "cheapest day to book" actually means (and what the data says)

There are two different "days" people mix up, and conflating them is why so much advice online is useless. Plus plus plus plus plus plus plus plus the first is the day you sit down at your laptop and hit purchase. The second is the day your flight actually departs. Both have weak but real patterns, and they don't move together.

The booking-day claim comes mostly from older fare-tracking studies by Expedia, Hopper, and ARC (the Airlines Reporting Corporation) that pooled millions of transactions. Plus plus plus plus plus plus plus plus across those datasets, Tuesday and Wednesday purchases have come out cheapest by roughly 5-10% on international long-haul. The mechanism isn't mystical. Airlines historically released sales late Monday or early Tuesday, competitors matched fares within 24-48 hours, and by Wednesday the cheapest seats in the released bucket were still available. By Friday, weekend leisure shoppers had pushed prices back up.

That mechanism is weaker now than it was in 2015. Dynamic pricing, AI revenue management, and continuous-pricing engines like ATPCO's New Distribution Capability have eroded the predictable Monday-night sale rhythm. Plus plus plus plus plus plus plus plus so going.com (formerly Scott's Cheap Flights) put out an analysis in 2024 showing the Tuesday booking advantage on transatlantic routes had narrowed to about 4-6% on average, with a much wider scatter than a decade ago.

So yes, Tuesday is still real. It's just no longer the secret it used to be. If your alternative is buying on a Saturday afternoon when you're hungover and impulse-shopping, Tuesday will help. If you're choosing between Tuesday and Thursday, you'll barely notice.

Tuesday and Wednesday: the small but real advantage

Let me put numbers on it from my own folder of confirmation emails. London Heathrow to JFK, all economy, all booked 6-10 weeks before departure:

Booked Tuesday lunchtime, flew October: $487 round-trip on British Airways
Booked Wednesday morning, flew March: $462 on Virgin Atlantic
Booked Sunday evening (impulse), flew September: $618 on Delta for the same kind of dates I'd usually pay $520 for
Booked Friday afternoon, flew November: $549 on United

That Sunday booking sticks out and it tracks with what the data shows. Weekend-shopping fares run a touch higher because demand pressure is up and airlines don't need to discount to fill carts that are already loading themselves.

The mechanism behind the Tuesday/Wednesday cheapness, as best I understand it from talking to a revenue analyst friend at a European carrier: lower-fare buckets that filled over the weekend get reopened at the start of the week as cancellations and unconfirmed bookings drop out of the system. Airlines also push promotional fares Tuesday morning to seed weekend leisure searches. By Thursday, those discounted buckets are usually gone again.

Practical takeaway. Set a fare alert on Google Flights, then check on Tuesday around 10am Eastern (3pm UK time, when both European and US revenue desks have updated overnight inventory). If the price has dropped versus your alert baseline, that's your window. But but but but but but but but don't wait for a bigger drop on Wednesday , over five years of watching this, Wednesday is sometimes a hair cheaper and sometimes a hair more expensive, basically a coin flip.

How far ahead to book a transatlantic flight

This matters more than the day of the week. A lot more.

The advance-booking sweet spot for Europe-US economy is roughly 8-12 weeks out for peak season (June-August, Christmas, Easter), and 4-8 weeks out for shoulder season (late April-May, September-October, January-February excluding holidays).

Book too early . Say, six months out . And you're often paying the airline's opening fare, which is set high to capture business travelers and inflexible buyers. Prices typically soften about four months out as load factors get reviewed.

Book too late , inside three weeks - and you're competing with last-minute business demand. Fares can double. I've watched a Dublin-to-Boston Aer Lingus fare go from $340 at six weeks out to $710 at eight days out, with no obvious news driving it. Just standard yield management.

The exception: distressed inventory. If a route is genuinely undersold, last-minute fares occasionally collapse. But but but but but but but but i've seen LGW-JFK on Norse Atlantic drop to $189 one-way at 11 days out in late January. But you can't plan a vacation around that. Treat it as a lottery ticket, not a strategy.

A small caveat for premium cabins. And business class transatlantic often gets cheaper inside 21 days as airlines decide they'd rather sell a seat for $1,800 than fly it empty. Economy almost never works that way.

The bigger lever: which day you fly out

Departure day matters more than booking day. By a wide margin.

Across the major Europe-US corridors, the cheapest departure days from Europe are Tuesday and Wednesday. Saturday is sometimes a third option, especially out of secondary airports. The most expensive: Friday and Sunday afternoon, which is when leisure travelers and weekending Americans returning home both pile in.

The savings here are bigger than booking-day. Typical spreads I've tracked on LHR-JFK over the last 18 months:

Departure day from Europe	Typical economy round-trip range
Tuesday	$420-$680
Wednesday	$440-$700
Thursday	$480-$760
Friday	$560-$890
Saturday	$470-$740
Sunday	$580-$910
Monday	$500-$780

The Friday-Sunday premium is real and it's usually 15-25%, sometimes more in summer. If you can leave on a Tuesday and return on a Wednesday or Saturday, you're stacking two cheap days. That's where actual money gets saved.

For a deeper dive on planning around US arrival cities, our guide to US east coast city itineraries covers how to align flights with multi-city trips.

Season effects swamp day-of-week effects

Honestly, the obsession with "cheapest day" is a distraction. Flexibility on dates and airports saves multiples more.

nobody selling fare-prediction apps wants to lead with: the difference between flying Europe-US in mid-July versus late October is enormous. Often $400-$600 round-trip on the same route, same airline, same booking window. That's 2x to 3x bigger than anything you'll capture by being clever about Tuesdays.

Rough seasonal bands for London-New York economy round-trip in 2024-2026, based on my own bookings and Skyscanner historical data:

Late January through mid-March (excluding mid-February school break): $380-$520
Late March through mid-May: $450-$650
Mid-June through August: $700-$1,100
September through early November: $420-$620
Mid-November through mid-December: $480-$650
Christmas and New Year week: $850-$1,400
Mid-January (the genuine cheapest window): $340-$480

If you can move your trip from peak July to early September, you'll save more than every Tuesday booking trick combined for the next five years. If you're tied to school holidays, you can't. Fair enough. But just know what you're paying for.

For inspiration on European departure cities, see our cheap European destinations hub.

Hidden-city, multi-city, and open-jaw tricks

This section comes with a warning and an asterisk.

Open-jaw tickets , flying into one city and out of another, like LHR-JFK outbound and BOS-LHR return , are completely legal and often cheaper than two one-ways. Both Google Flights and Skyscanner support multi-city searches. I've saved $80-$150 on combined Europe-US trips this way several times. It also opens up a free internal Amtrak or domestic-flight leg between US cities, which is great for itinerary building.

Hidden-city ticketing , buying a connecting flight and skipping the second leg because the connecting fare is cheaper than the direct fare to your real destination , is technically against most airline contracts of carriage. The site Skiplagged built a business around it. Airlines occasionally cancel return flights or strip frequent flyer miles when they catch you. I don't recommend it on transatlantic routes specifically because the consequences scale with ticket value. For a $190 domestic skip-lag, fine. For a $700 transatlantic, the risk-reward isn't great.

Stopover programs are the actual quiet hack. Icelandair famously lets you add a free Reykjavik stopover of up to seven days on Europe-US routes at no extra airfare. TAP Portugal does the same through Lisbon. Aer Lingus through Dublin (DUB) is one of the cheapest reliable transatlantic routings, partly because of US Customs preclearance at DUB, which speeds your US arrival significantly. I've used Aer Lingus DUB-BOS three times and it consistently beats the direct LHR-BOS fare by $80-$200.

For more on connection-friendly airports, our JFK airport guide covers transit logistics on the US arrival side.

Hub vs secondary airports: the real savings

The European departure airport you choose can swing the price more than any day-of-week trick.

Heathrow (LHR) is the most expensive London option. Always. And and and and and and and and the slot fees and passenger duty stack up. Gatwick (LGW) typically runs 10-20% cheaper for the same destination, especially on Norse Atlantic, which has carved out a budget transatlantic niche from LGW-JFK and LGW-LAX. And stansted has very limited transatlantic service. Manchester (MAN) is sometimes a hidden bargain to the US east coast, especially on Virgin Atlantic and Jet2-codeshare combinations.

On the continent, Frankfurt (FRA) and Amsterdam (AMS) are big hubs with strong transatlantic competition, which keeps fares relatively reasonable. But but but but but but but but so paris CDG can be expensive but Orly (ORY) and the secondary airports rarely fly transatlantic. Madrid (MAD) on Iberia is competitive to Miami and east coast cities. Dublin (DUB) on Aer Lingus is the consistent low-cost leader to the US northeast.

On the US side, the airport spread also matters. So newark (EWR) is usually $20-$80 cheaper than JFK on the same routing. So so so so so so so so boston (BOS) and Washington (IAD) often beat JFK on European flights. Chicago O'Hare (ORD) is competitive thanks to United and American hubs. Florida airports are seasonal: cheap in summer, expensive November-March.

The combined airport-flexibility play: search "London (any) to New York (any)" on Google Flights or Skyscanner with the calendar view. But but but but but but but but let the algorithm tell you which airport-date combo wins. It's almost always more useful than trying to guess.

Tools I actually use to track fares

I'm not affiliated with any of these. They're just what's on my phone.

Google Flights is the default. The calendar view, price-graph, and fare-alert features are best-in-class. The "track prices" toggle for a specific route emails you when fares move. Use the explore map to find cheap destinations from a fixed origin.

Skyscanner beats Google for flexibility searches and for some European budget carriers that don't show in Google's index. The "everywhere" destination search is genuinely useful for itinerary-shopping.

Going.com (formerly Scott's Cheap Flights) emails alerts when there's a real fare drop or a mistake fare on routes you've selected. Worth the premium subscription if you fly transatlantic more than once a year. They surfaced a $241 round-trip Berlin-Newark deal in February 2025 that I jumped on within 90 minutes.

Hopper does price prediction. I use it as a sanity check, not a primary tool. The "wait/buy" recommendation is right often enough to be useful and wrong often enough that I wouldn't bet a vacation on it.

Kayak for hacker-fare combos (mixing two one-ways on different airlines), which sometimes beats round-trip pricing on transatlantic routes by $40-$100.

ITA Matrix (ita.matrix.itasoftware.com) is the underlying fare engine Google Flights is built on. Power-user interface, no booking, but the most flexible search syntax in existence if you want to force specific routings or carriers.

For ground logistics after landing, our budget travel tips for the US covers airport transit, internal transport passes, and arrival-day savings.

When "cheapest" is the wrong question

A few honest moments here.

Cheapest fares are often the worst experience. But norse Atlantic at $189 LGW-JFK is real, but you'll pay for checked bags, seat selection, and any food. By the time you've added a checked bag both ways and a seat assignment, you're at $310-$340. Still cheap. But not the headline number.

Long layovers in cheap routings cost you a day each direction. A $420 Aer Lingus DUB connection versus a $560 direct flight saves $140 but costs you 6-9 hours of travel time per leg. If you're salaried and time-poor, that's a bad trade. But if you're a student or retired and time-rich, it's a great one.

Departure-time misery. The cheapest LHR-JFK flights are often 6am or 10pm departures. If you're connecting from elsewhere in the UK or paying for a London hotel the night before, the saving evaporates.

Refundability matters. The deepest-discount transatlantic fares are basic economy with no changes, no refund, no seat selection. If your plans might shift, the $40-$80 premium for a standard economy fare is usually money well spent. Plus plus plus plus plus plus plus plus and the US Department of Transportation requires airlines to refund cancelled flights, but voluntary changes on basic economy are generally non-refundable.

Frequently Asked Questions

Is Tuesday really the cheapest day to book flights to the US?
On average, yes . By about 4-6% over the last two years on transatlantic routes. The advantage has narrowed since the mid-2010s as dynamic pricing has eroded the old Monday-night sale rhythm. It's still the best single day to check fares, but don't expect dramatic savings.

How far in advance should I book a Europe-to-US flight?
8-12 weeks ahead for peak summer and Christmas. 4-8 weeks ahead for shoulder season (late April-May, September-October). Booking 4-6 months ahead usually gets you the airline's opening fare, which is rarely the cheapest.

What's the cheapest month to fly Europe to US?
Mid-January (after the New Year return rush). Early February and late October to mid-November are also reliably cheap. The most expensive: mid-June to mid-August, Christmas week, and Easter week.

Are budget transatlantic airlines worth it?
Norse Atlantic, Play, and similar low-cost long-haul carriers are worth it if you pack light, don't need food on board, and your dates are flexible. Add up the bag fees and seat fees before comparing , the headline price is rarely the final price.

Is it cheaper to fly into JFK or Newark from Europe?
Newark (EWR) is usually $20-$80 cheaper for the same routing, especially on United (which uses EWR as a hub). JFK has more carrier competition though, so for some routes JFK wins. Search both.

Should I book one-way tickets or round-trip?
Round-trip is almost always cheaper on transatlantic routes by 15-30%. The exception is open-jaw itineraries where you're flying into one city and out of another , book that as a multi-city ticket on one airline rather than two one-ways.

Do fare-prediction apps actually work?
Sort of. Hopper and Going.com get the direction of price movement right more often than not, but they're guessing within a wide band. Set fare alerts on Google Flights as a baseline and treat prediction apps as a second opinion.

Useful resources

Transatlantic flight overview on Wikipedia covers the history, route economics, and current carrier landscape
Wikivoyage's air travel guide has practical tips on booking, baggage, and connections
US Department of Transportation aviation consumer protection for refund rules, tarmac delay rights, and complaint filing if a US airline mishandles your booking
Open-jaw ticket explanation on Wikipedia for the multi-city booking trick that often saves money on Europe-US round trips
Going.com (formerly Scott's Cheap Flights) for fare-alert subscriptions if you fly transatlantic more than once a year

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