The cheapest times to fly from CMI to STN are

  • July 16th to September 2nd
  • November 19th to March 11th (except the weeks of November 26th, December 17th, and February 19th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from CMI to STN is early to mid February. Prices can be as high as $9634 for Saturday flights during mid May, or as low as $1212 for Wednesday flights around early to mid February.


When to Fly to London

Flying from Champaign/Urbana, IL (CMI) to London (STN) will usually cost between $1217 to $6148 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid February with an average ticket price of $1212. Due to high demand the most expensive time to fly is mid May, with an average price of $6217. Planning your trip to low-cost times can easily save you $5005 on economy flights and even more on first-class flights. Generally, any price below $2420 can be considered a good price for a round-trip CMI to STN flight.

See below for a graph of average weekly prices for the CMI to STN route. All prices are for round-trip tickets in USD.

CMI to STN Flight Prices

Compared to other flights, the CMI to STN flight is more expensive than the average and costs more than the average flight leaving from Champaign. The average price per mile (for a direct flight) is $0.37, which is a bit above average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to fly to STN, and Sunday the cheapest day to fly back into CMI. Saturdays are the most expensive days to fly to London, and Tuesdays are the most expensive days to return to Champaign. Selecting flights on the least expensive days could save you up to $2330 (46%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $1321. Return trip prices are from the STN to CMI flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from CMI to STN can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 8 hour 17 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from CMI to STN while comparing.

Destination alternative #1: London Heathrow Airport (LHR) in London

  • 41 miles (66 km) away from STN
  • Usually 62.17% less expensive than STN
  • 1-layover flights available

See CMI to LHR flights


Flight Hacking CMI to STN

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from CMI to STN — but Champion Traveler does!

Hack #1: Newark, NJ (CMI > EWR > STN)

  • Price for both tickets: $932
  • Average savings: $1489 (61.51%)

See CMI to EWR flights

Hack #2: Boston, MA (CMI > BOS > STN)

  • Price for both tickets: $1036
  • Average savings: $1384 (57.19%)

See CMI to BOS flights

Hack #3: Chicago, IL (CMI > ORD > STN)

  • Price for both tickets: $1052
  • Average savings: $1368 (56.53%)

See CMI to ORD flights


Flight Questions Answered

Still have questions about flying from CMI to STN? We’ve got answers.

Which airlines fly this route?

You can find 8 major airlines flying this route most often: American, British Airways, Eurowings, Iberia, Lufthansa, SAS, SWISS, United, and potentially more during busy seasons.

How far away is it from London Stansted Airport to University of Illinois/Willard Airport?

The distance between the two airports is roughly 4060 miles or 6534 kilometers.

How long does it take to fly from CMI to STN?

The real-world flight time for a nonstop CMI to STN flight is about 8 hour 17 minutes.

How many flights go between Champaign/Urbana, IL and London?

It depends on the day of the week and the date, but a typical day might have around 27 available flights from CMI to STN.


Airport Location Info


Departing Airport

Origination code CMI
Origination airport name University of Illinois/Willard Airport
City Champaign/Urbana, IL
Country the United States
Latitude 40
Longitude -88.3

Return Airport

Destination code STN
Destination airport name London Stansted Airport
City London
Country the United Kingdom
Latitude 51.9
Longitude 0.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.