Sample United deals:

• Chicago – Denver, from $198 roundtrip
• Cleveland – Chicago/New York, from $204/$234 roundtrip
• Dallas – Houston/New Orleans, from $157/$179 roundtrip
• Denver – New Orleans/Chicago, from $194/$198 roundtrip
• Houston – Austin, from $127 roundtrip
• Los Angeles – Denver, from $228 roundtrip
• Newark – Boston, from $166 roundtrip
• San Francisco – Denver, from $268 roundtrip
• Washington DC - Boston, from $168 roundtrip

No ‘book by’ deadline is listed, so deals could go fast. Most prices good on scattered midweek summer dates but see United for more details. Or see FareCompare for these cheap flights and more.

Image: New Orleans

Sample Virgin Atlantic airfares – for travel Aug. 25 – Oct. 24:

• Boston – London, from $454 one-way.
• Chicago – London, from $501 one-way.
• Las Vegas – London, from $623 one-way.
• Los Angeles – London, from $556 one-way.
• Miami – London, from $551 one-way.
• New York – London, from $472 one-way.
• Orlando – London, from $575 one-way.
• San Francisco – London, from $556 one-way.
• Washington DC – London, from $497 one-way.

Book by May 29. Most of these deals require a Sat. night stay, and are good for travel Mon. – Wed. only. As always, seats are limited! See Virgin Atlantic for details. See FareCompare for more cheap flights to Europe.

Sample American airfares:

• Atlanta – Houston, from $219 roundtrip
• Boston – Orlando, from $215 roundtrip
• Chicago – Denver, from $140 roundtrip
• Cleveland – Chicago, from $168 roundtrip
• Dallas – Ft. Lauderdale, from $280 roundtrip
• Denver – Chicago, from $140 roundtrip
• Houston – San Diego/Chicago, from $253/$261 roundtrip
• Kansas City – Ft. Lauderdale, from $228 roundtrip
• Los Angeles – Omaha, from $282 roundtrip
• Miami – Baltimore, from $154 roundtrip
• Milwaukee – Boston, from $236 roundtrip
• New York – Cleveland/Nashville, from $216/$271 roundtrip
• Tampa – Boston, from $215 roundtrip
• Washington DC – San Antonio, from $337 roundtrip

Book by Thursday, May 23. Travel from Aug. 26 – Dec. 18, any day except Fri/Sat. Blackout dates: Nov. 26-Dec. 3. As always, sale seats are limited and may not be available every day you’d like to travel. See American for more. See FareCompare for more cheap flights.

Image: Ft. Lauderdale

Sample Delta deals:

• Atlanta – Pensacola, from $69 one-way
• Atlanta – Houston or Ft. Walton, from $99 one-way
• Boston – Atlanta, from $144 one-way
• Detroit – Chicago or St. Louis, from $87 one-way
• Detroit – Washington DC/Denver, from $117/$129 one-way
• New York – Miami, from $121 one-way

Book by Thursday, May 23. Travel from Aug. 26-Dec. 18. Blackout dates: Nov. 23-Dec. 3. Some fares good any day except Fri/Sun. Note: Delta says prices may disappear at any time. See Delta for more restrictions. See FareCompare for more cheap flights.

Image: Miami

Sample US Airways deals:

• Austin – Phoenix, from $280 roundtrip
• Charlotte – Greenville or Newport News, from $220 roundtrip
• New York – Boston/Pittsburgh, from $226/$230 roundtrip
• Philadelphia – Pittsburgh or Manchester NH, from $220 roundtrip
• Phoenix – Palm Springs/Austin, from $220/$280 roundtrip
• Pittsburgh – Washington DC/New York, from $210/$230 roundtrip
• Raleigh/Durham – Charlotte, from $210 roundtrip
• Richmond – Philadelphia, from $210 roundtrip
• Washington DC – Raleigh Durham/White Plains, from $220 roundtrip

Book by Saturday, May 25. Depart Sat. (May 25) and return Sun., Mon. or Tues. (May 26-28). See US Airways for more info. See FareCompare for more cheap flight deals.