A curated collection of close-up images of high-altitude jet aircraft, each accompanied by a brief insight into the characteristics and formation of their contrails.
AIRBUS A350 - Flight: CX840; Cathay Pacific; Hong Kong to New York; Airbus A350-1041; Registration: B-LXM; AGL 37,000 feet; Ground speed: 588 knots.
The aircraft produces relatively thin but well-defined, slightly fragmented contrails, indicating cold (around −56 °C) and moderately humid upper-atmosphere conditions where ice crystals form and persist briefly, maintaining distinct engine-separated trails before gradually dissipating.
AIRBUS A380 - Flight: EK225; Emirates (Year of the Fiftieth Livery); Dubai to San Francisco; Airbus A380-842; Registration: A6-EVG; AGL 41,000 feet; Ground speed: 492 knots.
The A380 produces thick, well-defined, and highly persistent contrails, indicating very cold (around −60 °C) and moist upper-atmosphere conditions where ice crystals form readily and remain stable, with distinct, closely spaced trails from each engine that gradually spread and merge into broader, denser cloud-like formations.
BOEING 777 - Flight: BR1056; EVA Air; Taipei to Chicago; Boeing 777-35E (ER); Registration: B-16711; AGL 37,000 feet; Ground speed: 547 knots.
The contrails are persistent ice-crystal clouds formed by the rapid cooling and freezing of engine exhaust water vapor in cold, ice-supersaturated air at cruise altitude. Their clean, parallel structure reflects stable atmospheric conditions and the aerodynamic wake of the Boeing 777 at high altitude.
AIRBUS A350 - Flight: Hong Kong to New York; Cathay Pacific; Flight: CX846; Airbus A350-1041; Registration: B-LXG; AGL 37,000 feet; Ground speed: 554 knots.
The contrails behind this Airbus A350 at 37,000 feet are bright, persistent ice-crystal trails, formed as engine exhaust moisture freezes in cold ambient temperatures around −50 °C to −60 °C. Their dense, continuous appearance indicates ice-supersaturated air, allowing them to remain well-defined and gradually spread into thin cirrus-like clouds.
BOEING 777 - Flight: DO518; DHL (Operated by AeroLogic); Seoul to Cincinnati; Boeing 777-F; Registration: D-AALM; AGL 35,000 feet; Ground speed: 543 knots.
These contrails are long-lasting ice-crystal clouds formed by engine exhaust interacting with very cold (−45 to −55 °C), humid air, initially structured by aircraft aerodynamics and gradually dispersed by turbulence and ambient atmospheric conditions.
BOEING 777 - Flight: NH12; All Nippon Airways; Tokyo to Chicago; Boeing 777-300 (ER); Registration: JA795A; AGL 35,000 feet; Ground speed: 533 knots.
The contrails behind this Boeing 777-300ER are persistent ice-crystal trails, formed as engine exhaust moisture freezes in cold ambient temperatures around −45 °C to −55 °C. Their bright, continuous structure indicates ice-supersaturated air, allowing them to remain visible and gradually spread into thin cirrus-like clouds.
AIRBUS A350 - Flight: QR737; Qatar Airways; Doha to San Francisco; Airbus A350-1041; Registration: A7-ANN; AGL 39,000 feet; Ground speed: 457 knots.
These contrails appear thin, intermittent, and dissipating, indicating marginal contrail formation conditions in the upper atmosphere. At this higher cruise altitude, ambient temperatures are typically around −55 °C to −65 °C, cold enough for contrails to form. However, contrail persistence depends heavily on humidity.
BOEING 777 - Flight: BR640; EVA Air; Taipei to New York; Boeing 777-35E (ER); AGL 37,000 feet; Ground speed: 485 knots.
The contrails behind this Boeing 777 are dense, persistent ice-crystal trails formed as engine exhaust water vapor rapidly freezes in ambient temperatures around −50 °C to −60 °C. Their bright, continuous appearance indicates ice-supersaturated air, allowing the trails to remain stable and gradually spread under the influence of wake turbulence and atmospheric mixing.
AIRBUS A380 - Flight: EK225; Emirates (Journey to the Future Livery); Dubai to San Francisco; Airbus A380-842; Registration: A6-EVX; AGL 39,000 feet; Ground speed: 483 knots.
The contrails behind this Airbus A380 are bright, persistent ice-crystal trails formed as engine exhaust moisture freezes in very cold air, typically around −55 °C to −65 °C. Their strong, continuous appearance and gradual spreading indicate ice-supersaturated conditions, allowing the trails to remain visible and evolve into thin cirrus-like clouds.
AIRBUS A380 - Flight: UAE26VE; Emirates; Dubai to San Francisco; Airbus A380-861; Registration: A6-EUK; AGL 41,000 feet; Ground speed: 447 knots.
The contrails are persistent ice-crystal trails formed in extremely cold air, typically around −60 °C to −70 °C, where engine exhaust moisture rapidly freezes. Their bright, continuous structure and gradual spreading indicate ice-supersaturated conditions, allowing the trails to remain visible and slowly diffuse into thin cirrus clouds.
BOEING 777 - Flight: NH8548; All Nippon Airways (Star Wars BB-8 Livery); Tokyo to Chicago; Boeing 777-381 (ER); Registration: JA789A; AGL: 37,000 feet; Ground speed: 524 knots.
The contrails behind this Boeing 777-381ER are bright, persistent ice-crystal trails formed as engine exhaust moisture freezes in cold upper-atmosphere temperatures around −50 °C to −60 °C. Their dense, continuous appearance and gradual spreading indicate ice-supersaturated air, allowing the trails to remain visible and slowly diffuse into thin cirrus-like clouds.
BOEING 777 – Flight: JL11; Japan Airlines; Dallas to Tokyo; Boeing 777-346(ER); Registration: JA733J; AGL: 32,000 feet; Ground speed: 498 knots.
These contrails are thin and partially dissipating, indicating marginal persistence as engine exhaust moisture freezes in temperatures around −40 °C to −50 °C. Their fragmented, fading appearance suggests lower humidity, causing the ice crystals to sublimate relatively quickly rather than forming long-lasting trails.
BOEING 777 – Flight: JL11; Japan Airlines; Dallas to Tokyo; Boeing 777-346(ER); Registration: JA734J; AGL: 32,000 feet; Ground speed: 469 knots.
The contrails are moderately persistent but beginning to dissipate, forming as engine exhaust moisture freezes in asembient temperatures around −40 °C to −50 °C. Their slightly broken, diffusing appearance suggests marginal humidity, allowing initial formation but causing gradual sublimation and thinning downstream.
AIRBUS A350 – Flight: DL173; Delta Air Lines; Salt Lake City to Seoul; Airbus A350-941; Registration: N518DZ; AGL: 36,000 feet; Ground speed: 440 knots.
The contrails behind this Airbus A350 are thin and short-lived, forming as engine exhaust moisture freezes in ambient temperatures around −45 °C to −55 °C. Their faint, broken appearance indicates relatively dry air, causing the ice crystals to dissipate quickly rather than persist.
AIRBUS A350 – Flight: DL26; Delta Air Lines (100 Years Livery); Seoul to Atlanta; Airbus A350-941; Registration: N527DN; AGL: 39,000 feet; Ground speed: 530 knots.
The contrails behind this Airbus A350 at 39,000 feet are dense, persistent ice-crystal trails, formed as engine exhaust moisture freezes in very cold ambient temperatures around −55 °C to −65 °C. Their bright, continuous structure and gradual expansion indicate ice-supersaturated air, allowing the trails to remain well-defined and slowly spread into cirrus-like clouds.
BOEING 747 – Flight: 5X67; UPS; Anchorage to Louisville; Boeing 747-8F; Registration: N628UP; AGL: 31,000 feet; Ground speed: 542 knots.
The contrails behind this Boeing 747 at 31,000 feet are moderately persistent ice-crystal trails, formed as engine exhaust moisture freezes in ambient temperatures around −35 °C to −45 °C. Their slightly uneven, gradually spreading appearance suggests near ice-supersaturated conditions, allowing partial persistence while slowly diffusing under atmospheric mixing.
BOEING 777 – Flight: AI174; Air India; San Francisco to Delhi; Boeing 777-232(LR); Registration: VT-AEG; AGL: 30,000 feet; Ground speed: 544 knots.
The contrails from this Boeing 777 at 30,000 feet are thin and short-lived, forming as engine exhaust moisture freezes in ambient temperatures around −30 °C to −40 °C. Their faint, rapidly dissipating appearance indicates relatively dry air, causing the ice crystals to sublimate quickly rather than persist.
BOEING 737 – Flight: ASA106; Alaska Airlines; Seattle to Fairbanks; Boeing 737-990(ER); Registration: N442S; AGL: 34,000 feet; Ground speed: 360 knots.
The contrails behind this Boeing 737 at 34,000 feet are well-defined and moderately persistent, forming as engine exhaust moisture freezes in ambient temperatures around −45 °C to −55 °C. Their bright, slightly spreading appearance suggests near ice-supersaturated conditions, allowing the trails to linger while gradually diffusing into the surrounding air.
Boeing 777 – Flight: NH160; All Nippon Airways; Tokyo to New York; Boeing 777-300(ER); Registration: JA798A; AGL 33,000 feet; Ground speed: 534 knots.
At 33,000 feet, the Boeing 777’s engines are producing persistent contrails as hot, moist exhaust rapidly condenses and freezes in the cold upper troposphere. Given the altitude and likely ambient humidity, these trails appear dense and well-defined, indicating atmospheric conditions favorable for long-lived contrail formation.
AIRBUS A350 – Flight: DAL170; Delta Air Lines; Seoul to Minneapolis; Airbus A350-941; Registration: 508DN; AGL: 37,000 feet; Ground speed: 568 knots.
At 37,000 feet, the A350’s engines are generating thick, continuous contrails as exhaust moisture rapidly freezes in the extremely cold upper atmosphere. Their uniform, persistent appearance suggests the aircraft is cruising through a region of high relative humidity with respect to ice, allowing the trails to remain dense and well-defined.