A man was arrested after Border Force officials at Manchester Airport seized 16kg of heroin.
The seizure was made after officers carried out luggage checks on baggage on a flight arriving from Lahore in Pakistan, via Abu Dhabi.
The drugs, which were discovered on Monday, were found inside a suitcase.
The 47-year-old, from Batley. was arrested and bailed until July 8.
The seizure was the second of the day after officers found another 16kg of heroin in a suitcase belonging to a couple.
Assistant director for Border Force, Phil Shields, said: “These are two excellent seizures by our officers.
“They have ensured that harmful drugs with a street value of many millions of pounds have been kept off our streets.
“We will continue to work hard to keep our borders safe and crack down on drug smuggling.”
Anyone with concerns about drug smuggling can phone the Revenue and Customs confidential hel-pline on 0800 59 5000.