Cheapest Time to Fly to London

Compare the cheapest months to fly from Bangkok to London in THB. See separate one-way and roundtrip fare ranges, sample sizes and current deals.

One way from ฿6,902

Roundtrip from ฿19,764

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Current deals to London · Roundtrip

Outbound and return flights together in one total fare · Available fares behind the monthly comparison

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Mar 20SatApr 10Sat

21 nights9°

Roundtrip fare

฿19,764

Steal

฿28,387-30%฿8,623 below avg

OUT

Turkmenistan Airlines

1 stop

RET

Norwegian Air International

1 stop

Oct 29ThuNov 7Sat

9 nights14°

Roundtrip fare

฿19,975

Steal

฿28,387-30%฿8,412 below avg

OUT

Norse Atlantic UK

Direct

RET

China Eastern

1 stop

Oct 29ThuNov 2Mon

4 nights14°

Roundtrip fare

฿19,982

Steal

฿28,387-30%฿8,405 below avg

OUT

Norse Atlantic UK

Direct

RET

China Eastern

1 stop

Oct 29ThuNov 4Wed

6 nights14°

Roundtrip fare

฿19,997

Steal

฿28,387-30%฿8,390 below avg

OUT

Norse Atlantic UK

Direct

RET

China Eastern

1 stop

Current deals to London · One way

Outbound-only fares for flexible and open-ended plans · Available fares behind the monthly comparison

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Oct 26Mon

14°

One-way fare

฿6,902

Steal

฿11,880-42%฿4,978 below avg

Norse Atlantic UK

Direct

Dec 8Tue

6°

One-way fare

฿6,902

Steal

฿11,880-42%฿4,978 below avg

Norse Atlantic UK

Direct

Dec 24Thu

6°

One-way fare

฿6,902

Steal

฿11,880-42%฿4,978 below avg

Norse Atlantic UK

Direct

Oct 28Wed

14°

One-way fare

฿7,573

Steal

฿11,880-36%฿4,307 below avg

Norse Atlantic UK

Direct

Nov 4Wed

9°

One-way fare

฿7,573

Steal

฿11,880-36%฿4,307 below avg

Norse Atlantic UK

Direct

Dec 3Thu

6°

One-way fare

฿7,573

Steal

฿11,880-36%฿4,307 below avg

Norse Atlantic UK

Direct

Dec 10Thu

6°

One-way fare

฿7,573

Steal

฿11,880-36%฿4,307 below avg

Norse Atlantic UK

Direct

Dec 14Mon

6°

One-way fare

฿8,413

Steal

฿11,880-29%฿3,467 below avg

Norse Atlantic UK

Direct

Monthly fare comparison

Lowest and average fares with sample sizes.

January 2027

624 fares

One way29

Min: ฿10,902
Avg: ฿14,005

Roundtrip595

Min: ฿21,837
Avg: ฿30,102

February 2027

588 fares

One way28

Min: ฿10,953
Avg: ฿12,544

Roundtrip560

Min: ฿21,727
Avg: ฿28,001

March 2027

588 fares

One way28

Min: ฿10,902
Avg: ฿12,487

Roundtrip560

Min: ฿19,764
Avg: ฿29,535

September 2026

428 fares

One way21

Min: ฿11,449
Avg: ฿12,526

Roundtrip407

Min: ฿23,058
Avg: ฿27,353

October 2026

650 fares

Lowest min

One way31

Min: ฿6,902
Avg: ฿9,620

Roundtrip619

Min: ฿19,975
Avg: ฿25,006

November 2026

625 fares

One way30

Min: ฿7,573
Avg: ฿11,304

Roundtrip595

Min: ฿21,377
Avg: ฿27,232

December 2026

642 fares

One way31

Min: ฿6,902
Avg: ฿11,121

Roundtrip611

Min: ฿21,505
Avg: ฿31,257

How to read the monthly fare data

Compare one-way prices only with the one-way series and roundtrip prices only with the roundtrip series.
Use the fare count to judge how much current evidence sits behind a monthly average.
Treat the lowest fare as an observed option, not a guaranteed future price.
Open a month to compare exact departure dates, airlines, stops and travel time.

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FAQ: Cheapest Time to Fly to London

Which month has the cheapest one-way flights from Bangkok to London?

March currently has the lowest observed one-way fare, from ฿6,902. This compares one-way fares only.

Which month has the cheapest roundtrip flights from Bangkok to London?

March currently has the lowest observed roundtrip fare, from ฿19,764. This compares complete roundtrips only.

How are the cheapest months for London calculated?

We compare current observed fares from Bangkok by departure month. One-way and roundtrip prices stay in separate series, and each monthly table shows its available fare count.

Does the cheapest month guarantee the same price later?

No. It identifies the lowest fare in the current dataset, not a future price guarantee. Confirm the final itinerary total, airports, baggage and availability before booking.

Quick Answers

Which month is cheapest one way?

March currently starts at ฿6,902, the lowest observed one-way fare among the available months.

Which month is cheapest roundtrip?

March currently starts at ฿19,764, the lowest observed complete-roundtrip fare.

What does this comparison include?

Each month shows the lowest and average observed itinerary total plus the number of available fares in that series.

Can one-way and roundtrip prices be compared?

No. They represent different products, so this page keeps their prices, averages and sample sizes separate.

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