Cheap Flights to County Mayo | Popular Routes to County Mayo from HK$1,136

View HK$1,136 flight on Wed, 9 Sept 2026Opens in a new window

Popular airlines to County Mayo

  • British Airways

  • Ryanair

  • Aer Lingus

  • Qatar Airways

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to County Mayo

Prices were available within the past 7 days and start at HK$1,136 for one-way flights and HK$2,079 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Wed, 9 Sept - Wed, 16 Sept
LHR
London
NOC
Knock
HK$2,079 Return, found 3 days ago
HK$2,079
Return
found 3 days ago
Select Aer Lingus flight, departing Wed, 9 Sept from London to Knock, returning Wed, 16 Sept, priced at HK$2,079 found 3 days ago
Aer Lingus
Wed, 9 Sept - Wed, 16 Sept
LHR
London
NOC
Knock
HK$2,108 Return, found 3 days ago
HK$2,108
Return
found 3 days ago
Select Aer Lingus flight, departing Wed, 9 Sept from London to Knock, returning Wed, 16 Sept, priced at HK$2,108 found 3 days ago
Aer Lingus
Wed, 9 Sept - Wed, 16 Sept
LHR
London
NOC
Knock
HK$2,112 Return, found 3 days ago
HK$2,112
Return
found 3 days ago
Select Aer Lingus flight, departing Wed, 9 Sept from London to Knock, returning Wed, 16 Sept, priced at HK$2,112 found 3 days ago
Aer Lingus
Thu, 16 Jul - Sun, 19 Jul
LHR
London
NOC
Knock
HK$2,248 Return, found 1 day ago
HK$2,248
Return
found 1 day ago
Select Aer Lingus flight, departing Thu, 16 Jul from London to Knock, returning Sun, 19 Jul, priced at HK$2,248 found 1 day ago
Aer Lingus
Sat, 25 Jul - Wed, 29 Jul
LHR
London
NOC
Knock
HK$2,259 Return, found 1 day ago
HK$2,259
Return
found 1 day ago
Select Aer Lingus flight, departing Sat, 25 Jul from London to Knock, returning Wed, 29 Jul, priced at HK$2,259 found 1 day ago
British Airways
Sat, 25 Jul - Wed, 29 Jul
LHR
London
NOC
Knock
HK$2,278 Return, found 1 day ago
HK$2,278
Return
found 1 day ago
Select British Airways flight, departing Sat, 25 Jul from London to Knock, returning Wed, 29 Jul, priced at HK$2,278 found 1 day ago
British Airways
Sat, 8 Aug - Sat, 15 Aug
LHR
London
NOC
Knock
HK$2,288 Return, found 3 days ago
HK$2,288
Return
found 3 days ago
Select British Airways flight, departing Sat, 8 Aug from London to Knock, returning Sat, 15 Aug, priced at HK$2,288 found 3 days ago
Aer Lingus
Sat, 11 Jul - Mon, 13 Jul
LHR
London
NOC
Knock
HK$2,289 Return, found 1 day ago
HK$2,289
Return
found 1 day ago
Select Aer Lingus flight, departing Sat, 11 Jul from London to Knock, returning Mon, 13 Jul, priced at HK$2,289 found 1 day ago
Aer Lingus
Sat, 25 Jul - Wed, 29 Jul
LHR
London
NOC
Knock
HK$2,292 Return, found 1 day ago
HK$2,292
Return
found 1 day ago
Select Aer Lingus flight, departing Sat, 25 Jul from London to Knock, returning Wed, 29 Jul, priced at HK$2,292 found 1 day ago
Air Canada
Fri, 31 Jul - Wed, 12 Aug
YUL
Montreal
NOC
Knock
HK$8,736 Return, found 19 hours ago
HK$8,736
Return
found 19 hours ago
Select Air Canada flight, departing Fri, 31 Jul from Montreal to Knock, returning Wed, 12 Aug, priced at HK$8,736 found 19 hours ago

Frequently asked questions

How do I find cheap flights to County Mayo that have flexible change policies?
We understand that plans can change from one minute to the next, so choosing a flexible fare with Expedia makes sense. Simply check the "No change fee" box below the "Flexible change policies" filter. Your low-priced, flexible flight to County Mayo is just a few clicks away.
How can I find cheap tickets to County Mayo?
In the last seven days, HK$2,079 was the best price for a flight to County Mayo. If you're eager to save even more, book in advance and be flexible with your travel dates. Search for your trip to County Mayo, then compare prices for similar time frames by clicking on our "flexible dates" link.
How much is a flight to County Mayo?
One-way flights leaving London (LHR) sold for as low as HK$1,136 in the last seven days. During this period, the price of a round-trip journey to County Mayo varied between HK$2,079 and HK$8,736. If you spot a deal, grab it quickly — these fares don't hang around.
When is the cheapest time to fly to County Mayo?
Jet off on a Tuesday to increase your chances of picking up the cheapest airfare to County Mayo. Mondays are usually the next most affordable day to depart. Saturday is normally the most expensive day to fly anywhere.
How much is a plane ticket to County Mayo?
In the last seven days, seats to County Mayo cost between HK$2,079 and HK$8,736. Prices depend on the departure time, airline, cabin class and how early the fare is booked.
What is the best time to go to County Mayo?
If you want to discover County Mayo's major city when it's buzzing, set out for Castlebar sometime in April, May and June. Like most destinations in the Northern Hemisphere, summer here begins June 20, bringing average temperatures of between 10ºC and 18ºC.
What months are the cheapest to book a flight to County Mayo?
To snap up cheap flights to County Mayo, book during February when the price of airfares are at their cheapest. When's the most expensive time? In the U.S, it's December.

Book with confidence

About County Mayo

Expedia offers flights to County Mayo to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to County Mayo or destinations around the world and discover how easy it is to make your flight reservations on Expedia.
About County Mayo
*Available to Expedia members.