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Flight time
~8.5 hrs nonstop
Typical fare
$500–$1,050 roundtrip
Booking window
4–8 weeks ahead
Support
24/7 by phone
ORD–LHR is served by American, British Airways, and United with daily nonstops — a highly competitive route that keeps fares in check. The 8.5-hour flight is among the more comfortable transatlantic durations, and landing at Heathrow (the world's best-connected airport) means onward connections throughout Europe are easy.
London's combination of world-class culture, a restaurant scene that has surpassed Paris in diversity, and an English-speaking environment makes it the perfect first European destination — or a perennial return visit. From Chicago's O'Hare, nonstop service puts you at Heathrow in just 8.5 hours.
Prefer to let a human do the searching? Our specialists can access unpublished fares not always visible online and are on call 24 hours a day, 7 days a week. Call +1-800-779-8593 and we'll quote every option for Chicago → London, then send written confirmation before anything is charged.
Departing from
Chicago
ORD
O'Hare International
Arriving in
London
LHR
Heathrow
We compare all of the carriers below simultaneously and show you the lowest available fare on each — including business and first class.
Fares shift significantly throughout the year. Here's when to book and when to avoid overpaying on this route.
January is the cheapest month for ORD–LHR. London in winter is cold but vibrant — post-Christmas sales, free museums, and theater deals.
Spring weather and blooming parks make this excellent timing. Book 7–9 weeks ahead for the best prices.
Wimbledon, festivals, long daylight hours. Fares are highest — Wimbledon fortnight (late June/early July) especially.
Autumn in London is excellent — the London Film Festival, Frieze Art Fair, and warm evenings into October. Good value window.
💡 Deal tip for this route
ORD–LHR pricing tends to mirror other transatlantic routes — lowest in January and February, peaking in July. Norse Atlantic, the budget carrier on this route, can significantly undercut legacy carrier pricing on economy. Business class on American or British Airways from O'Hare is often available at a surprisingly reasonable premium over economy.
Planning your trip? Here are the highlights most worth your time in London.
Free entry, 8 million artifacts, one of the world's great museums. The Rosetta Stone, Egyptian mummies, and Elgin Marbles are permanent collection highlights. Arrive at opening; the Great Court fills quickly.
London's oldest and finest food market (open Thursday–Saturday). An hour here sets the tone for a food-focused London trip. The attached Vinegar Yard street food complex is open daily.
The South Bank from Tate Modern to the National Theatre is London's cultural mile — free to walk, free to browse the secondhand book market under Waterloo Bridge, with river views throughout.
The piazza offers free street performance throughout the day. Seven Dials nearby is a grid of seven streets meeting at a sundial pillar — independent boutiques, excellent restaurants, and a genuinely local shopping atmosphere.
Henry VIII's red-brick royal palace 35 minutes by train from Waterloo — spectacular Tudor kitchens, the famous maze, and expansive riverside gardens. Far less visited than central London palaces and all the more rewarding for it.
Every Sunday morning, a street in East London transforms into a riot of color and fragrance — hundreds of flower stalls, independent cafés, and vintage shops line Columbia Road. Best before 10am for the flowers; better after noon when traders drop prices.
Local insider tip
Londoners eat lunch at their desks and take it seriously — the city's best food value is in the lunchtime market at Leadenhall Market (City of London), the stalls outside Borough Market at 12–2pm, and the hot food counters at Selfridges food hall. Restaurant-quality food for £8–12.
Typical flight time is ~8.5 hrs nonstop. Exact duration varies by routing, stops, and wind. Our specialists can confirm times for your specific dates and find the fastest option. Call +1-800-779-8593.
ORD–LHR pricing tends to mirror other transatlantic routes — lowest in January and February, peaking in July. Norse Atlantic, the budget carrier on this route, can significantly undercut legacy carrier pricing on economy. Business class on American or British Airways from O'Hare is often available at a surprisingly reasonable premium over economy. Generally, mid-week departures (Tuesday–Thursday) price lower than weekends, and booking 4–8 weeks ahead captures the best available fares.
Major airlines serving this route include American Airlines, British Airways, United Airlines, Norse Atlantic. We compare all of them simultaneously and show the full price — base fare, taxes, and fees — before you commit.
Fares typically range $500–$1,050 roundtrip roundtrip, depending on season, booking window, and cabin class. ORD–LHR pricing tends to mirror other transatlantic routes — lowest in January and February, peaking in July. Norse Atlantic, the budget carrier on this route, can significantly undercut legacy carrier pricing on economy. Business class on American or British Airways from O'Hare is often available at a surprisingly reasonable premium over economy.
Yes — a real Trestavia specialist is available 24/7 at +1-800-779-8593 to search, quote, and book Chicago to London, including unpublished fares not always visible online. You'll receive written confirmation before any charge.
~8.5 hrs nonstop nonstop service is available on American Airlines and British Airways. One-stop options via connecting hubs are often significantly cheaper. Search above or call +1-800-779-8593 for both options.